@DoANoob: Ninja clans Volume 2 and 3 are planned to be released in the next weeks. Seeing how even Akira got a shinobi outfit, at this point I believe that the characters remaining out from the pack will be Hayate, Ayane, Hayabusa and Kasumi (maybe, but they could decide to give her an extra ninja outfit not released for Alpha), having alrerady got their with NINJA2015 pack. Be sure that we will see the rest of the roster as Zack or Bass get a ninja outfit.
By the way the outfits are truly stunning, especially the male ones (even if I think that every female is great with the classic kunoichi vest)! Seeing how the DLC pack will be released even on PS3, I really hope that 360 will not be excluded...
The best part about it is you could make a joke of it. Remember the days when someone said "This game has too many ninjas." Oh yeah? Now your character is a ninja too. "Deal with it" Epic shades place.