I want Nintendo to stay as far away from First Person shooters as possible, or have you all forgotten Red Steel? They went out of their way touting the Wii as the next best thing in the world of FPS games and look where that went, no where.
I do not like FPS, that is why I stick to Nintendo, if someone wants those types of games buy a stupid Xbox or get them on their PC. I think having a few for variety is alright but don't start catering to the "hard core" crowd an alienate the dedicated fans.
I wouldn't mind a Mario Paintball though, that would sound like fun, or even a Mario Lazer Tag. There you go, Mario Paintball and Metroid Lazer Tag. I would like to see more epic adventure games on the scale of Gods of War and similar types of games like that, and a return to the glory days of JRPG's like SNES.