Soul Sacrifice 2, Phantasy Star Nova, Freedom Wars (uh, what a shitty name) and Gravity Rush 2 as far as the games go. Though I doubt any of these games will change Vita's situation that much
There's been a lot of discussions on how the Wii U was a year too late system, but that truly feels like it with the Vita. If it came out in 2010(if that was anywhere near possible), and positioned itself as having phone capabilities, it would be more successful.