Production recently wrapped on the next James Bond movie Spectre, which is set for release on November 7. The action-adventure brings back Daniel Craig as 007 for the fourth time, and director Sam Mendes for his second Bond movie after the 2012 blockbuster Skyfall. The director revealed in an interview with BBC Radio that he doesn't plan on coming back to direct a third Bond movie.

"It feels almost, even though we've just finished shooting it, like one big experience and it was a fantastic life-changing thing. It really is more a lifestyle choice than a job. I don't think I could go down that road again. You do have to put everything else on hold. I said no to the last one and then ended up doing it, and was pilloried by all my friends. But I do think this is probably it."

Spectre has been an international shoot, with production taking place in London, Mexico, Italy and Morocco, with a cast and crew of more than 1,000 people. The director revealed that Spectre is much bigger than its predecessor, the $1 billion blockbuster Skyfall. He added that the production has been an "enormous undertaking," which may be a reason why he isn't coming back to the franchise.

"You really do feel it. This is a bigger movie than Skyfall. It's shot in more places - we were in Mexico City and Tangiers and northern Sahara and Rome and the Alps and London. It's been an enormous undertaking."

Skyfall stars Daniel Craig (James Bond), Ralph Fiennes (M), Naomie Harris (Moneypenny) and Ben Whishaw (Q) are all set to reprise their roles. New cast members include Christoph Waltz, Léa Seydoux, Andrew Scott, Dave Bautista and Monica Bellucci. The story centers on a "cryptic message from Bond's past" that leads him to the sinister organization known as Spectre. While the director wouldn't say anything about the story, he did confirm that the theme song for Spectre has been written.

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"I can say that the song's been recorded and it's fantastic and I'm very excited about it. You won't have to wait long."

The director wouldn't confirm who performs the new theme song, but hopefully we'll find out very soon. There was a rumor that surfaced in November that the production wanted Rihanna for a role in the movie and to perform the theme song. Her involvement was never confirmed. If Sam Mendes does actually leave the franchise, it will come at a very intriguing point, since the rights to the entire franchise will be up for grabs after Spectre hits theaters in November. Are you disappointed that Sam Mendes is leaving the 007 franchise? Who do you think should take over after his departure?