Yeah, something like
So, basically EVO but with a marketplace system and a micropayment system? EVO was a cool game, but from the art side of things I think it's actually easier to do the mix-n-match bodyparts thing in 3D, especially since it also makes custom colors/texturing easier. Doesn't have to be as complicated as Spore's system to look and work nicely.
Yep, something like that (but with improved graphics). I don't know about the 3D, it seems harder. But then I know close to nothing about 3d artwork.