The iconic voice of Optimus Prime, the legendary voice actor Peter Cullen attended SacAnime 2015 and answered fan questions.
He stated that Transformers 5 and 6 to might be less darker in tone than the previous movies and will go back to its roots.“There is a sense that Transformers movies are going into a darker area” stated Mr. Cullen. “I think I brought the concern to the movie studio and certainly to the writers. Perhaps…Transformers 5 and 6 movies will go back more to its roots. There was an occasion where one line [in Transformers: Age Of Extinction] which Optimus Prime had, I did not want to say. It was my gut instinct and certainly my commitment to the character… not to say the line. But I was told to say. You can’t fight the big boys. I think you all know what that line was.”