First idea - Prime Arcee gets stuck working with Armada Starscream.
Arcee is of course extremely pissed, but is surprised when she realizes this Starscream actually has a code and some measure of integrity.
Starscream meanwhile is shocked and insulted by hearing what a preening cowardly jackass this other version of himself is like.
They eventually grow a tight bond
And then Starscream heroically sacrifices himself again and Arcee's trauma gets even further fucked
Another - because Elita 1 and Pointblank were the only Autobots released alongside a bunch of Con deluxe class figures, I'm imagining they wound up Legacy-Crossover-Portalling to the same spot, and have to work together to survive while surrounded on all sides
Prime Knockout winds up amongst all the decepticons and predacons, even though he's long been a defector by this point, but he keeps quiet and doesnt do anything because he likes his hide in-tact, especially with that Tarn guy looming over anyone with second throughts.
He saves his catty comments to his personal diary.
Eventually his hand accidentally lands in some of tarantulas's webbing and he defects immediately consequences be damned he just can't be doing with that.