Plot Details and Rumors

At the end of Transformers: Age of Extinction, we saw Optimus Prime blast off into outer space while the rest of the Autobots, now led by Bumblebee, remained to protect the planet from a once more at-large Megatron.
The synopsis for Transformers: The Last Knight reveals that Optimus eventually returns to his home planet of Cybertron, but finds that it’s now dead and that he is the one responsible for it. He then learns of a way to restore it back to life through an artifact that can only be found on, where else, Earth. And then, this is where things get weird.
According to JoBlo, it turns out that the artifact is somehow tied to the legendary wizard Merlin, yes, the Merlin of Arthurian lore, which makes it almost certain that the artifact refers to the mythical sword Excalibur, especially since the movie’s initial logo included a sword right in the middle.

Apparently, Merlin received ‘magical’ powers from a Transformer, which shouldn’t be a surprise, as the franchise has shown the robotic alien race visiting our planet in past millennia. It remains to be seen whether Optimus Prime will search for the artifact by traveling through time or tracking its whereabouts in the present day.
The addition of British mythology to the Transformers universe certainly seems bonkers, but after the Dinobots, who will be returning in the movie, it doesn’t seem too far out there.
