The Transformers franchise has not been shy on exploring the history of the Autobots and Decepticons and their connections to Earth. They have so far been tied to the Hoover Dam, the pyramids, and dinosaurs, but they are looking to explore history even further in Transformers: The Last Knight. Early reports on the plot have tied Transformers to the reign of King Arthur, the Knights of the Roundtable, and the Excalibur sword, which all seem to play into the subtitle for the fifth movie.
Paramount has yet to confirm any ties that the story could have to the times of old, but that has not stopped set photos from further hinting at this connection. If there was any doubt that this is the path that the movie will be following, there is hardly any room for that left with the latest bit of casting bringing in a major player in the mythology.
Mashable reports that Liam Garrigan has joined the cast of Transformers: The Last Knight and will be playing King Arthur himself. This should be the final piece to the puzzle in confirming reports of the plot, but this is not yet official news. Should Garrigan in fact be playing King Arthur in the movie, it will not be his first time doing so. He has already played the character in Once Upon a Time for ABC.
Along with the news that Garrigan will play King Arthur, Mashable also revealed that Santiago Cabrera who has already been confirmed to be in the movie, will be playing Merlin the magician. Now that the movie has both Arthur and Merlin on the cast, it shows what stage in their lives the characters will be when they cross paths with the Transformers.
It remains unclear how Arthur and Merlin connect with the Transformers and how this becomes the story of the film, but many have speculated that Optimus Prime himself is the last knight of the roundtable. If this is the case, then Excalibur will be the latest weapon that he will wield to battle Megatron once more. The rest of the movie has so far been kept under wraps, so it is hard to say beyond the obvious encounter in the past how these two sides come together. Whatever the case may be, it should be interesting to see how they handle the flashback sequences, plus seeing how the Transformers hide in that day in age.
Transformers: The Last Knight opens in U.S. theaters on June 23, 2017, followed by the Bumblebee spin-off on June 8, 2018, and Transformers 6 on June 28, 2019.