Well this was a rumour about a TV movie for the character of Spike from Buffy the Vampire Slayer played by James Marsters, but from the comments from Joss Whedon through Coming Soon from Moviehole, it might be a bit more. When asked about the rumours he said:

"I'm talking in reference to that... and possibly more," he said hinting at additional characters from the series coming back as well. "I can only teasingly hint, unfortunately, until it's got backing and we've got a schedule and a contract...

..."been talking to some of the actors, writers, and some executives and are trying to put something together - - but it's not happening fast. [But no] I haven't left the Buffyverse behind."

Ooh, that does sound like more than just a TV movie, and perhaps more than just Spike. I doubt another Buffy movie is likely, but perhaps an Angel or Spike on the big screen? He's brought one series there, perhaps the execs see the cult status of his other shows working in film? I'm sure there would be a load of fans for this one, are you?