User blog comment:Commdor/Rumor: ME3 "Rebellion" Multiplayer DLC Incoming/@comment-1221773-20120509182344

More evidence that Rebellion might be more than a rumor: http://blog.bioware.com/2012/05/09/operation-silencer/

The post says that the vorcha want to join the fight and are completing training. That's a pretty big hint.