For a while its been rumored that J.J. Abrams has been tossing up between directing a "Star Trek" sequel, and a fourth "Mission: Impossible".

Now, the director tells MTV News that the latter isn't likely - "I'm producing with Tom [Cruise]. My guess is, given other things, that I will not be directing the movie."

As for the rumors that Cruise wouldn't star in the film, he's more evasive - "I will say that it's a story that will feel consistent with the world that has been created. It's not a reboot kind of thing."