I like the Bay films, honestly Transformers some what moved out of my life until the 07 film, and each one after that has refired up my love. That said I'd like to see him do ONE more and then move on. Perhaps even reboot the series. This world is easily as deep as Star Wars, there's no reason why they can't do a TON. I think Marvel has proven you don't need to focus on Earth either. Guardians did a good job away from that location.