In an interview with IGN, Producer Lorenzo Di Bonaventura was asked when the end will come for the franchise, and according to him its Michael Bay’s last film.
“I would think so,” he said. “I would think so.”
“It may not be the end of the line of Transformers for Hasbro and Paramount,” he added indicating that a reboot with a new creative team could still happen in future. “But I would think so…Director Michael Bay I’m sure is…He’s spent a lot if years working on one thing!”