Shia Lebeouf said recently that he would not come back if a new Transformer's movie was released. Hmm, it would be hard to do a movie without it's lead character. He also said that he doesn't think Michael Bay the director of the flicks would return for another movie either.
However, Shia fans might be excited to know that he might return to a 5th installment of the Indiana Jones series. Right now there aren't any major plans for the movie but it seems that it is going to happen.