Hmm, I remember few weeks after its launch, people were commenting how it bombed. In fact WiiU sold extremely well, but Bayo 2 wasn't successful even with that advantage. People will say it was because of P* poor marketing or game's difficulty, but we have to remember Nintendo promoted it everywhere, even in Playboy.
Platinum games have problems with sales, even if they make quality games, they would probably bomb, it's their karma, their "curse", even Minami already said that.
Clover studio, from where Kamiya and his colleagues came from already had that problem, that's why capcom closed the studio and tried to replace them in other teams.
If this is a tactic to sell or to have a Bayo 3 approval, it wouldn't work very well either since I can't imagine too many people buy a WiiU just to see a Dante's cameo, a Dante that even made by Kamiya, he wouldn't resemble what he is in DMC1, for Kamiya is not his only "father"; Dante is a child of a bunch of people and circumstances.