Metroid to Sucker Punch.
Reason: Sucker Punch does a great job of making a TPS character who feels like a hero. They get the traversal and platforming that's integral to Metroid. The only issue I can see is level design, but to be fair, the've never been asked to make a 3D Platform Adventure game, so they may have it in them. Storytelling would also be an issue, but... Baby steps.
Pokemon to, wait for it, Kojima Productions x Gamefreak.
Kojima loves Pokemon. He's gone on record saying he was obsessed with Gold and Silver and that it had a direct influence on Peace Walker, which in turn means it had an indirect influence on MGSV. Those games would be completely different if he never played Pokemon. No fulton. No post game story content. No collecting soliers to build an army. Those are all ideas he got from Pokemon. I don't know if Kojima has it in him to make an E Rated game, but if he does, he could make the most bomb-ass Pokemon game the world has ever seen.
I genuinely believe that Pokemon changed his focus back to not having too many cutscenes, since no on complains that PW has too many, and PP arguably has too little. With that in mind, I think the man is intelligent enough to weave a kid-friendly deep and engaguing plot in a massive open Pokemon world. And the nuance he adds to gameplay would make the world feel amazing.
