So Michael Bay has said that Transformers: The Last Knight is going to be the last movie he directs in the franchise. Then again, he said the exact same thing whilst making Age of Extinction... and whilst making Dark of the Moon. So really, for all we know, Bay could end up directing Transformers 6 if Paramount ends up enticing him with more cash and the promise to fund one of his passion projects again.
But to take him at his word for a moment, let's just imagine what that looks like: a Transformers movie not directed by Michael Bay.
At the very least, the upcoming Bumblebee spin-off won't be in Bay's hands (it's being helmed by Kubo and the Two Strings' Travis Knight), but to see a main entry in the franchise finally in the hands of someone else is an exciting prospect. After five films of basically the same thing over and over again, maybe a new voice can bring something fresh to the property.
Even after so many sequels, the Transformers brand has not been exploited to its full potential. Bay may have squeezed every last ounce he can out of it, but rarely did he ever use the property to its full potential. There is serious potential for a genuinely good blockbuster to be made out of Transformers, and the following directors are exactly the right talent who can revitalize the series for a new generation.