In an article with USA Today, the actor talks about his summer of success's with Transformers 4 and three producing efforts in movies and TV doing very well. As part of that he continued to not definitely answer the question on whether he would be directing Transformers 5 or not. He continues to lean to "not" saying "There's kind of a new chapter, a new direction in movies I want to make. I have a lot of stories to tell. And it's about flexing new muscles." Then again he outright said he was not directing Transformers 4 until Paramount likely significantly upped his payments for doing the movie. The previous three films netted him an average of $75 million and I would not be surprised if that number climbs to $100M for TF4. Hard to ignore that kind of money for a job that is already his until he decides otherwise. Basically until an official announcement is made, I am just assuming the next Transformers 5 film is being directed by Bay.