Priceless brought this over to Buffyforums.
Season 12 Announced! - Page 23
I'm not sure if this has been mentioned, but a French site, Slayer Revival are saying (google translated )
At the level of history, this season 12 resumes after the end of the events of season 11 where it is stated that the gang spent a year in calm, far from the forces of evil. And yet, when Xander and Dawn are having a little homecoming party, familiar faces knock on the door, forcing Buffy and her friends to regain service. Faced with a horde of vampires, Wolfram & Hart and a future vampire called Harth, Buffy will find herself trapped in a temporal rift that could put an end to the Slayer line.
The 'trapped in a temporal rift' wasn't in the original CBR post. Sorry if I'm repeating old information, but I don't remember this.
The temporal rift part is new I believe.I don't remember that.