Ben Affleck was supposed to be in summer blockbuster smash Barbie, according to Michael Cera.Cera played doll Allan in the film and speaking at a Q&A this week (via The A.V. Club), Cera revealed that original plans for the scene would have featured a cameo from Affleck, with him initiating a fight scene Cera is involved in towards the end of the film.He suggested Affleck wanted to do the movie but couldn’t due to his acting and directorial commitments on Air.“I wasn’t even supposed to fight in the movie,” Cera explained.