I've been mushing about this for a while aside from the fact that Kain is here, and so, I finally found the Tokyo Game Show 2010 trailer of this said game!
Ah, Kain. A traitor as always. No wonder you are one of my faves in the original game because you are unpredictable!
Edited: Posted a better quality of the video, also in if you want a much better quality of the trailer, go to their official website.