It seems like almost every villain is coming back, so in my opinion it looks like season 7 might be the last. In the season premiere it is listed that Drucilla, Glory, Warren, and The Master are in it. And in the second episode Beneath You Catherine (Amys mother) returns. I guess shes out of the cheer leader staue.

Wow, they really are bringing back every villian. It makes you wonder what the heck they're going to be doing this season if they have 4 villians in one episode. I have to agree, this does seem to be the last season.