Cera publicly said he doesn't want to do the movie. But considering that he owes his career to AD, he probably will get talked out of it. The only other holdout I can see is David Cross, just because that seems like something he'd do.
Isn't David Cross known for being extremely professional? I can't imagine him holding out if that's the case.
I think Michael Cera or Portia de Rossi are the most likely. They both probably think they're above a flopped show by now and IMHO George Michael and Maeby are geting a little old for their roles.
I haven't seen Maeby outside of AD, I'm sure she'll take any work she can get. Michael Cera can still play a teen. Really though, who says the movie can't be occurring a few years later anyway? Perhaps Lucille is just getting out of prison.
I don't really see it. Cross pops up in all kinds of projects big and small. He did a guest spot on Aqua Teen Hunger Force which has a production budget of $17.