Nintendo fans are not the problem, i mean it's normal to buy Nintendo games instead...
the thing is to bring other gamers to Nintendo's system, except fans, which is not the case with WiiU, especially since Nintendo choose the Wii path once more, and is not developing any FPS at all
Nintendo could expand Metroid beyond the story mode into a huge online game with character customizations and stuff, but they just won't do it.... if this was done is such a way it could compare to Halo or CoD then 3rd parties could have smth on WiiU, and the problem is not the 3rd parties really, it's the hard core games, cause Just Dance and Skylanders don't have the same problem i guess
don't mind my username, that was more than 10 years ago, I'm a different person now, amazing how people change ^_^