Quote from Jtprime17 on upcoming collabs when this one dropped.
Transformers is uniquely positioned to do it because even as a kid in the 90s during the neon G2 deluge we were thinking "what if X from Y was a Transformer?"
I can only imagine what it was like for kids in the 80s when stuff like Ghostbusters and Knight Rider was recent.
Anyway some predictions
Star Wars- Hasn't it been predicted to be something Mandalorian-related?
Sonic- I'm sure there's a beastformer mould from Kingdom or Legacy they can whip up into a Sonic character. Bonus points if it's a new character and they put "OC DO NOT STEAL" on the package.
Batman- Gotta be the Batmobile, right? Question is what version? BTAS is beloved, the Battinson Batmobile promotes the recent iteration of the brand, the Tumblr is from what everyone calls the best Batman movie ever, and the '89 version gets you that '80s property crossover they got with Ghostbusters, BttF, and Knight Rider.
Hot Wheels- They did a transforming Hot Wheels Optimus, didn't they? I don't know Hot Wheels, but I'm sure there's an iconic Hot Wheels car they could turn into a Transformer.
MOTU- Oh wow. Probably either Catilla from Tigatron or one of those hover tanks? I don't know MOTU that well but I know it has vehicles.
NFL- Honestly? What I'd do is take SS Bumblebee concept Megatron, give him a techno blue and silver paint job, and slap a Calvin Johnson robot head on him.