The controls for Bioshock (one at least, haven't played the second one) are pretty much traditional FPS controls with a secondary weapon of plasmids.
IIRC, The first Bioshock ran on Unreal Engine 2.5, which has been ported to the Wii. The game is crazy with bloom and surface effects though, so that would have to be toned down a lot. It also has a fair amounts of physics with the weapons and unless they spent a lot of time converting it over, it would probably turn out pretty lousy.