Moving to a new time slot is usually bad for a show instead of good, at least in my opinion. See Family Guy, Titus...basically every comedy Fox debuted on Sunday and then moved to a different night (except maybe Bernie Mac). Seinfeld gained from moving to Thursday nights because people were already watching NBC on Thursday nights. As far as I can tell, Sunday is already Fox's biggest night...it's definitely the biggest night for comedies.
Oh well, that's off-topic anyway.
An MTV launch may tick off hardcore gamers, but I ask you: what dedicated Nintendo fan is going to change his mind about buying a Revolution because it debuted on MTV? If Nintendo gives us good sequels to certain games, that's all it will take to sell practically every person here on Revolution. Having said that, a "real" debut followed shortly by an MTV debut would be an equally good or better idea. I also agree that Nintendo could screw it up and look out of touch, but I think all you need is Reggie and a focus on the T and M rated games to look in touch.