So, I see we have some attempts to keep up with Vita news while I've been gone at least :p. I'll fill in the gaps:
Lost Dimension trailer showing 2 new characters:
http://gematsu.com/2015/05/lost-dimension-trailer-introduces-mana-george
New Moero game announcement coming this week (for anyone who doesn't know, the other two are Monster Monpiece and Moero Chronicle):
http://gematsu.com/2015/05/new-moero-game-announced-this-week
Some new Net High details:
http://gematsu.com/2015/05/net-high-teaser-trailer-details-screenshots
Some new Tokyo Xanadu details:
http://www.siliconera.com/2015/05/25/tokyo-xanadus-battles-rely-a-lot-on-attribute-strengths-and-weaknesses/
A remake of Angelique (very old Otome game) coming to Vita/PSP in October in Japan:
http://www.siliconera.com/2015/05/24/koei-tecmos-angelique-remake-will-release-this-october-for-ps-vita-add-psp/
My thoughts on all this? I'm surprised it's taken them this long to announce a new Moero game - the first two, supposedly, were surprise successes for Compile Heart (they undershipped both at launch). Should be striking while Vita is still viable.
And I feel like Net High could be potentially awesome. DanganRonpa with an internet twist. At least it's a Marvelous game, so there's a chance XSEED will take a gamble on it.