I also took the time to pick their brains about possible Wii U, PS Vita, and PC versions. On the Wii U, they mentioned that they liked the platform a lot. However, they conceded that for the type of game they want to make, the Wii U just doesn’t meet the criteria. As for PS Vita and PC, they wouldn’t comment on the possibility of the game launching on those platforms.
Source: http://www.hardcoregamer.com/2014/0...onto-next-gen-in-dragon-ball-xenoverse/90243/
As a Dragon Ball fan I wanted the game to be on the Wii U but considering how amazingly the game looks it certainly would be a shame to have the graphics be torn down so that it'd work on it, despite that they'll be releasing Dragon Ball: Xenoverse on PlayStation 3 and Xbox 360.
There's also the other potential reasons that A) Wii U sales might have had effect on their decision, B) 25GB may have had not been enough for the entire game unless Nintendo's Blu-rays can at some point be 50GB instead.
Oh well, no biggie I was already planning to go with PlayStation 4's version (probably the best way to play it) anyway.