I have a friend from NZ that I saw playing Iron Man and i can honestly say it's amazing and it clearly shows that ports like Superman Returns are very possible and capable and I would love it if someone in charge of that dept. would at least think about this because I think it's a great idea and I'm definitely getting Iron Man asap! When it comes out..but who else thinks this is a good idea? Comment!
I'm not sure which rendition of Supes Returns you are referring to, but on my PSP, before iPhone gaming, I loved that Justice League game.
Superman Returns was a TERRIBLE GAME sure the flying around Metropolis was fun. But as a game it was terrible repetitive boring and broken. No where even close to as bad as Superman 64 but still a terrible game.
If Gameloft handled it, it'd be epic. But as for anybody else making a Superman game, it'd probably be awful.