preferably titles that haven't seen a new game/remake since PS2/PSP. so stuff 2gens and older. ps1 and ps2.
I have a couple
I'd first love to see a Blasto super hero inspired game.
second one is dark cloud, there is no reason to not have a cartoony young adventure game similar to zelda but somewhat different depending on the developers vision. take a twist on it basically.
third one is The Getaway, while the abundance of open world games is plenty now. I think this can be rebooted into a really deserving open-world third person heist game.