TRANSFORMERS 5 IMAX Teaser Trailer (2017)

"The story for Transformers: The Last Night will involve Optimus Prime finding his home planet, Cybertron, now a dead planet, which he comes to find he was responsible for killing. He finds a way to bring the planet back to life, but in order to do so he needs to find an artifact. And of course, that artifact is on Earth."
So if the report is true, that means we will finally get to see Cybertron, even though we have seen it a bit in flashbacks, but it sounds like it will be a pretty big fixture in the movie. Because Optimus will be occupied, the report notes that Bumblebee will be back and in a leadership role, along with Hound, Crosshairs and Drift who will be based out of the badlands in South Dakota. Oh, and the Dinobots will reportedly be back as well and allegedly in a larger role than their disappointing very short turn at the end of Age of Extinction.

So Optimus will clearly have to return to Earth to get the mysterious artifact that the report references and the plot of the film will go a little bit off the rails from there, depending on how accurate this report is. Supposedly, the artifact that can fix Cybertron is tied into the King Arthur days and more specifically, the magician known as Merlin. Here is what the report claims.