It annoys me they bring warriors orochi on the Vita, but not Gundam reborn. I wanted that one on the Vita. :(
Not so interested on Warrior orochi. I cant enjoy the games so much without a strong historical storyline behind them. Or you know... an anime one.
I wouldn't get too annoyed at Tecmo Koei. They've released pretty much every game they own the IP to in the west. It's Bamco that blocked Gundam (& One Piece).