I've enjoyed the past 3 movies but finding out that there was going to be a 4th one was a bit of a bummer for me. I know that in order for the series to not get repetitive, they're going to have to make alot of changes. The first change that popped into mind was not using Optimus as the main character. He would still be there, but send in a rookie autobot to be the star (and no not bumblebee, because he's almost a damn veteran killing Cons as easy as Optimus). Reason being is because even since rotf, prime has been nothing but a killing machine killing anything and anyone that crosses his path. This does 2 things to him and the decepticons: Makes him seem overpowered, and boring; makes the decepticons seem weak and un-coordinated. It may sound overused and i know you've heard this a billion+ times, but use Hotrod for christs sake, or hell, cliffjumper(no comic citing PLEASE). This time if Bay is still going to just stuff explosions everywhere the cast goes then at least he can put a new autobot in the middle of them fighting beside optimus.