Just ahead of the debut of the Super Bowl TV spot for "Transformers: The Last Knight," Paramount Pictures has unveiled an official synopsis for the fifth film in the blockbuster franchise.

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With more than four months until "The Last Knight's" theatrical release, we shouldn't expect a lot of plot details, but what this description does give us is additional clues to the film's scope as well as its place in the budding Transformers cinematic universe. Oh, and it hints at how -- or, rather, why -- King Arthur, Dark Ages Europe and Nazi Germany come into play:

The Last Knight shatters the core myths of the Transformers franchise, and redefines what it means to be a hero. Humans and Transformers are at war, Optimus Prime is gone. The key to saving our future lies buried in the secrets of the past, in the hidden history of Transformers on Earth. Saving our world falls upon the shoulders of an unlikely alliance: Cade Yeager (Mark Wahlberg); Bumblebee; an English Lord (Sir Anthony Hopkins); and an Oxford Professor (Laura Haddock).

There comes a moment in everyone’s life when we are called upon to make a difference. In Transformers: The Last Knight, the hunted will become heroes. Heroes will become villains. Only one world will survive: theirs, or ours.

Michael Bay's final Transformers film as director, "The Last Knight" sets the stage for the planned expansion of the $3.78 billion franchise that includes a Bumblebee spinoff slated for 2018, another Transformers sequel in 2019, and a possible origin movie for the constantly warring Autobots and Decepticons.

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"The two lines of mythology in a sense give you freedom to go a lot of different places later on that may or may not directly relate to another movie," said series producer Lornezo di Bonaventura, "but it’s opening up the universe in a way that I think, in that way it’s probably the most provocative, in terms of the movie. It’s opening a really large universe of what Transformers is, and where they’ve come from, and how we relate to them, and how they relate to themselves.”

Opening June 23, “Transformers: The Last Knight” stars franchise veterans Mark Wahlberg, Stanley Tucci, Josh Duhamel, Tyrese Gibson and John Turturro, joined by newcomers Isabela Moner, Liam Garrigan, Jerrod Carmichael, Mitch Pileggi, Laura Haddock, Santago Cabrera and Anthony Hopkins.