The buzz has been building forever about a possible Arrested Development movie – here’s the update: it’s happening, but the question is whether or not Michael Cera will sign on.

Will Arnett told E! News: “For once and for all, the Arrested Development movie is happening!” That sounds like a pretty solid confirmation.

Will Arnett, Jason Bateman and AD producer Mitch Hurwitz met with reporters to promote their new animated Fox series, Sit Down, Shut Up and talked a bit about Arrested Development.

When asked if Michael Cera would reprise his role as George-Michael, Hurwitz said, “I hope so… We’re just trying to get all the actors on board.”

Jason Bateman added that “I know he’s [Michael Cera] thinking about it. And we’re all awaiting some finality to all of that so Mitch can get writing.”

Bateman added, “You’d have to get [Michael] on the phone to get his answer about whether he’s going to come back and do it or not. He’s certainly not said that he won’t do it. I think Michael is clearly the guy that has come out of Arrested Development with a very big plate, so I think he’s trying to really give some responsible thought to what makes sense for him to do with his career. The guy is 20 years old and I’m sure he doesn’t want to screw up this opportunity.”

What’s in store for the Arrested Development movie? Hurwitz says, “We’re going to pick up five years later, and family dynamics change, but they also kind of stay the same. So hopefully we’ll just explore where they are now.”