To say that Joss Whedon is a busy guy would be a massive understatement, but he's still not ruling out a Buffy The Vampire Slayer spinoff that has been on the back burner for years.
Ripper would be a BBC-produced series focusing on the adventures of Buffy's mentor, Rupert Giles (Anthony Stewart Head), who earned the nickname "Ripper" way back in his occult past.
Whedon told The A.V. Club that the BBC is interested in any series involving magic and Anthony Stewart Head, and because Head just keeps getting better-looking, there's no real hurry to make Ripper.
[Y]ou could make that now, or you could make it 10 years from now. And I've tortured Tony more than any other living human with, "We're definitely gonna do this!" Because I thought we were. He's working so much, though, I'd feel too guilty. But that's the thing with Ripper: It doesn't go away in my head because he's still right for it, and he could still bring it.
The rest of the interview, covering The Avengers, Cabin in the Woods, and some other Whedon projects, is well worth a read.