For once I'm on top of things with this round of updates. Nothing particularly thrilling or unexpected about the roster update except for more SW dudettes, and the new mechanics sound like they were swiped from Endless Frontier (incidentally this sounds like battles either aren't going to let you field many units at all or they're going to take even longer than before and the general strategy will be reduced to cluster up and flatten everything).
And for the lazy people who don't want to click links...
Chun-Li - Street Fighter
Morrigan - DarkStalkers
Valkyrie - Valkyrie no Bouken: Toki no Kagi Densetsu
Gemini & Erika - Sakura Wars
Haken Browning & Kaguya Nanbu - Super Robot Taisen OG Saga: Endless Frontier
Bruno - Die Hard Arcade (Dynamite Deka)