Transformers: The Last Knight just launched a big trailer that showcases everything you'd expect from a Michael Bay movie (big explosions, fast action, flashy eye candy) - with a little bit of Transformers lore along with it.
One of the biggest potential reveals The Last Knight could have in store is the live-action adaptation of Unicron, one of the biggest bads in the Transformers universe (literally). Admittedly, Unicron has been rumored for about the last two or three Transformers movies, but since The Last Knight has the most compelling evidence of his inclusion, there's some Unicron Facts You Need to Know before checking out the film.
He Is 1 of 2 Transformers Gods
Unicron is the evil twin brother of Primus, who is the creator god of the Transformers. While Primus is a force for benevolence and good in the multiverse, Unicron's only function is to bring chaos and destruction, with the goal of being the only god in a lifeless universe.
Unicron was created by The One, to explore the universe as it began. The One then divided Unicron in two, creating Primus as his twin. The war between Primus and Unicron has gone on since the beginning of the Universe, and could be the bigger story arc that Transformers: The Last Knight filmmakers have hinted at.
He's The Evil Cybertron
As the war between Unicron and Primus went on, Primus realized that he was no match for his brother in combat. In an act of sacrifice, Primus lured Unicron from the Astral plane to the physical one, trapping them both within metallic planetoids.
Primus went on to become the planet Cybertron, and grew new life in the form of Transformers; Unicron eventually learned to transform his planet form into a giant robot form using the energy from consumed planets, and went on to become the scourge of the multiverse.
He's the Devil
Unicron is often compared to a "Faustian Devil" of the Transfomers Universe; he's the embodiment of evil and often operates through temptation and corruption of others, rather than direct action.
Like Marvel Comics villains Galactus or Apocalypse, Unicron likes to have disciples or "horsemen" serving as his harbingers and henchmen. The most famous of these is Galvatron, the resurrected form of Megatron. Since Transformers: Age of Extinction kind of already blew the whole Galvatron storyline, Unicron's Four Horsemen would be more likely for The Last Knight.
Is Unicron responsible for the resurrection of a rusted Optimus Prime into the evil purple-eyed guy we see in The Last Knight? Maybe.
He's a Threat to Everyone
Primus is the creator of all Transformers, Autobots and Decepticons, and loves them as his children; as a consumer of worlds, Unicron doesn't ally himself with anyone - certainly not the Decepticons.
Autobots, Decepticons, and humans have all united in order to stop the threat of Unicron across the multiverse; if Unicron is the threat we're going to see in The Last Knight, both factions of Transformers may have to work together (along with old and new human protagonists) to save the universe.
He's Been in the Movies Before
Unicron has been in a Transformers movie before: he was the big villain of the 1986 Transformers: The Movie animated feature.
That version of Unicron is the one mainstream fans are most familiar with, voiced by acting icon, Orson Welles. Welles famously said he hated doing the movie, and only did so for the money (as did Star Trek's Leonard Nimoy, who voiced Galvatron). However, Welles' baritone tones also made Unicron a classic evil villain. If The Last Knight brings Unicron into live-action, the vocal performance better be on point.
The cast of Transformers: The Last Knight features Mark Wahlberg (Planet of the Apes) as Cade Yeager, Isabela Moner (100 Things To Do Before High School) as Izabella, Josh Duhamel (Life as We Know It) as Lieutenant Colonel William Lennox, John Turturro (The Big Lebowski) as Seymour Simmons, and Tyrese Gibson (Furious 7) as Robert Epps, as well as Jerrod Carmichael (Neighbors 2: Sorority Rising), Anthony Hopkins (Thor: The Dark World). The voice cast includes Peter Cullen as Optimus Prime and John Goodman (10 Cloverfield Lane) as Hound.
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Transformers: The Last Knight is set for release June 23, 2017.