Cybertron appears rarely in the live-action films, but each appearance matters to the plot. Here's a short history of the home planet on the big screen.
Transformers (2007)
Optimus explains that Cybertron died in the war over the AllSpark. The Autobots come to Earth because the AllSpark ended up here — their last hope of reviving their world.
Dark of the Moon (2011)
Sentinel Prime and Megatron try to bring ruined Cybertron into Earth's orbit using a network of space bridges, so humans can rebuild it. The plan is foiled, and the planet dies a second time.
The Last Knight (2017)
Cybertron returns — now in the hands of Quintessa, a mysterious creator who wants to revive the planet at Earth's expense. The film also hints that Earth may be Unicron.
Bumblebee and Transformers One
Bumblebee's prologue shows the last days of the battle on Cybertron, and Transformers One shows its prosperity and hidden injustice. Although these films don't form a single timeline with the earlier ones, together they give the fullest picture of the home planet on film.
