While another film may seem unnecessary to some, lets think about it for a second. Ever since the first Transformers film, our biggest competition has really been Harry Potter. Now that Hp is done for the moment (baring an unexpected remake of some sort) most of our competition is out of the way. Surveying the rest of the playing field the only movies with potential to possibly match a Transformers film in box office are either a Twilight film or some sort of Marvel/DC movie. This is just me speaking though, i'd love to hear everyone else's input.