3 New characters, it seems. As in really new, never been in a BlazBlue game before, not even story.
Amane Nishiki
Barret (Bullet?)
Azrael
https://twitter.com/jinjya3/ This guy's been reporting on the announcement.
http://www.mmcafe.com/cgi-bin/forums...es/13362.shtml - This forum post summarises stuff that Jinjya3 has posted.