Money, violence, sex, computer graphics, scatalogical humor, racism, robots designed to be rednecks but given European accents, and maybe another sequel to the saga... what's not to love? TF m1, Revenge of the Fallen, Dark of the Moon and now Age of Extinction.
After the commercial failure of "The Last Knight", Hasbro and Paramount decided to cancel plans for the upcoming movies, save for "Bumblebee" which was already in production at that point. Hasbro and Paramount told us it would be the last film set in the Bayverse. Sort of bookending the series, filling in the gaps of Bumblebee being on Earth since WWII that "The Last Knight" established, and where he'd end up in the 2007 film. During post-production on "Bumblebee" however, I believe it was the studio that began saying they were going to wait and see how the film performed as to whether or not they'd treat it was a prequel or a fresh start. It would seem they decided not to wait however, as they made late changes to the film to firmly establish it as a fresh start.