Would be cool, but honestly i'd like Bend to make an Infamous Vita title or God of War Vita.
UC:GA was selling good until it came to PS+, so now really the most people should have it. And i think it would be far too early to make a second game. It wouldn't add to "the games you want to justify a vita purchase", and it won't help pushing software.
Please, no UC:GA2.
must-have-list for platforms i don't own yet:
WiiU: Donkey Kong
XBone: Dead Rising 3, Ryse