He doesn't get his frame right away, it's one of those instances where the Allspark's energy is unleashed unexpectedly and some sh*t happens- that's how the Constructicons and Wreck-Gar(i think?) were created.
In that case the energy was unleashed when the Decepticons+Megs were fighting with Autobots for the cluster of Allspark Shards in some smelting factory. There were mountains on scraps to smelt where htey were and at one point, Bee fell into the slope of the crushing machine and the scraps flooded over him. He actually had one of the shards with him and that's what triggered it. The weird glowing happened and scraps started flying to the pile making it bigger. The huge kettle-things that held molted metal broke and the stuff poured in thru the cracks to the pile. Not few kliks after the pile started to move and a giant humanoid scrap monster emerged from it with a terrifying screech. As it crawled out of the mountain the scraps started falling off of it and a freshly-forged, still having that hot glow to it, Warframe stood there. There was supposed to be a storm that day, and it started jsut at the right time; the rain fell down from the sky cooling the heated metal til it was shining with golden glow. The fight has completely stopped in order to pay attention to what is happening.
I actually have songs that inspired this scene-
Bifrost by Ummet Ozcan, it's the 1st half- the fight is happening, Bee has the Allspark Shard, he falls into the slope and get buried. The shining happens and the beat drop from 1:32 is the build-up and him emerging as freshly forged warframe. (See this post for the low-detail design i made)
Ryu by Ummet Ozcan, it's the 2nd half. The beat from the start made me think of him standing on top of the scrap he emerged from, face towards the sky as the rain falls on him and chills his frame. His optics open as the beat that drops at 0:18. He looks at his servos and smiles, then Megatron speaks up-
"Well, that's certainly a pleasant surprise... The Architect himself returning in glory."
To Autobots' surprise they hear Bee's voice, a tiny bit different but still his, coming from the giant that just appeared. "Heh... of course you'd miss me."
Megatron nods to him, a sign of respect, then calls retreat. "Let them have this victory. Today is a great day for us all." He says when Lugnut questions.
The rest of the song can be him forging stuff montage and building his workshop, idk my imagination refuses to cooperate for anything but the start of the song.
Of course, the others are wary of him cuz a) he's a freking giant now. b) Megatron himself was happy for "his return". They go back to base and Bee tells them his story and how unfair he was treated. (he doesn't mention the being conjuxed part)
The others are still a bit wary but it gets replaced with concern the more they hear about what the Elite Guard did to him and his home. Heck, Sentinel was the one to order reformatting on him! If they hated his guts already they now despise him with all their Sparks... aand Bee is freaking out cuz he's his true self now and he's pretty sure Sentinel will just kill him if he found out. Later they speak about his abilities and ask if he can forge them weapons n stuff. He says yes under one condition- he's allowed to leave the Autobot faction. He states upfront he's not gonna join the 'cons and just wants to be neutral to everyone. The team agrees.
As for the reactions; yeah the team is very- well, like they say "fish out of the water". They are awkward and confused, they often forget Bee is not small anymore. They'll hear his voice and turn to look down to speak- and only see his pedes.
Bee has to get used to being big again for sure- if all his furniture was adjusted to him being small, now it has to be adjusted to him being big- a new berth is really what he needs but also bigger gaming controller and now he can get high shelves for his room! He still forgets he's not small anymore and will look up if one of his teammates speaks to him- he's so used to looking up at them to talk it's so weird to get used to looking down to talk to them. It's not that bad, both of them do this all the time, it's kinda funny. Bulkhead makes funny remarks like "Welcome to the big bot struggles" whenever Bee hits his helm on a door frame or his horns catch on some low-hanging stuff and he does this weird pulled-back move.
Bee defo points out Prowl is now the shortest, karma baby. He's been bugged about his height all the time, now it's his turn to point and laugh.
Sari on the other hand, is now adorable. She so smol. He says he thinks she's adorable and she doesn't like it. She's not the type to be called cute, damn it! Bee takes her on rides tho so thery're good.
The most surprising part is when they find out Bee essentially becomes Ratchet when fixing the damage done to his upgrades for Team Prime. Ratchet is just amused- except when he gets damaged and it's up to Bee to fix him cuz they don't have the key anymore. Oh how the tables have turned...
They're also flabbergasted when Bee picks up some heavy container Bulkhead has trouble carrying on his own with little issue. It's just unreal to them- a little minibot who's physical strength only topped Prowl is suddenly a giant monster truck whose raw power nearly matches Megatron himself.
Bee is also happy to be able to tackle-hug Blitz again. He's the strongest one again. As much as Bee loved being wrapped in his Conjunx's big arms he loves to just hold all of Blitz in his own.(Bee is taller than Blitz btw.)
I imagine Bee has his own quarters in the new workshop along with Blitz but he still keeps the room at the plant, it's his home after all. They visit often.
I almost forgot! When Blitzwing sees his love trapped under scrap he's literally about to ditch everything to save him but then the weird stuff happens and he feels this tingling sensation thru his bond and witnesses Brasshorn 2.0 emerging from the scrap. He just stands there shocked and mesmerized until Megatron calls retreat.
Megs knows now that The Architect is back Blitz will go running to his Conjunx so the moment Blitz says he's going on patrol Megs knows he's gonna go see Bee so he tells Blitz to say hi on his behalf.
When Blitz arrives at the meeting location he doesn't suspect being surprise tackle-hugged the moment he lands. They talk and Bee finally has the chance to scoop Blitz up in his arms bridal-style, like in the old days. They're happy.
Once Bee has his workshop Blitz visits surprisingly often, but it's only when Ratchet is called to Bee's workshop to come alone and finds Bee worrying over Blitz who's been injured in battle earlier that day it's known they are together. Bee practically yells at Ratchet to patch him up and of course, Ratchet is a medic and would do it anyway but he does demand an explanation- he is surprised to hear that Bee's been Conjuxes with Blitz for centuries but understands why Bee didn't tell them. He does however tell him to tell the others soon instead of waiting for an issue to occur when they find out on their own.
So the next day when his team and Sari are at his workshop and find Blitz recovering from the battle Bee tells them about the aspect of his past he didn't tell them yet- that he was actually Conjuxed to someone back then.
"Really? To who?" Optimus threw the question, both curious and unsure of the answer.
Bee came up to Blitzwing, who's been sitting on the unoccupied workbench, and takes his servo in his. "To him." He said with a hopefull smile, which only grows as Blitzwing leans to his side and squeezes his servo back.
The silence and questions Bee was answering that followed were broken by Sari who's only now processed what Bee said- "YOU'RE MARRIED??" "Yep!"and the couple laughed.
So this is resolved and Team Prime is not targeting Blitzwing in combat- that also applies to Blitzwing. He's helping the 'cons of course but as soon the fight starts he just leaves. He can't help them fight nor can do anything cuz the Autobots guard whatever they were trying to get. He does however steal some metarials when they are doing resource-gathering missions- half of them still goes to Bee tho. Megs is not amused by it.
The Elite Guard finds out only when Megatron demands that Earth will be made into a Neutral Zone. Oddly enough the repair crew also forces them to do their job and get the Allspark and leave them there. So yeh, Sentinel is kinda pissed but can't do anything cuz Optimus and his crew are backing Bee up(he's kinda intimidated by them in secret cuz they did kick Megatron's aft mulitple times for a simple repair crew) and Megatron himself is supporting everything behing that. So they are kinda forced to comply and leave Earth alone, but not without Jazz making himself to be the link in the neutral zone and gets them access to the fine weaponry Bee makes- in reality he also wanted to just chill out on Earth he grew to like and this was the perfect opportunity to do so. He gets to keep his job and hang out with his friends and sibbling-figure(Prowl) all day long. I imagine Jettwins follow soon after to "help the colony out on Autobots' behalf", also they can't stand Sentinel's attitude without Jazz around so yeh.
I think that's about it? I might have forgotten few things but eh, it's long as is.
