The movie opens with the post-credit scene of Age of Extinction, except the title appears when the metal satellite envelops the camera.
Optimus and Megatron were awestruck as Cybertron slowly emerged from a large portal in the Alpha Centauri system, only visible through a telescope.
"Do you think that the others survived?" said Optimus.
"Possibly." said Megatron, who still looked through the telescope, "But we will never know until we return." Prime suddenly had a thought.
"What was the point of bringing back a dead world?" said Optimus, "Without the Allspark, we cannot restore it."
"We have the Allspark." said Bumblebee, who was also present, "Remember? We used it to bring me back after Stinger nearly killed me?"
"It may still exist," said Optimus, "but it is still beyond our reach."
"What's that?" said Megatron as he saw a small body fly toward Cybertron.
"Let me see." said Hound who looked through the telescope next, "Sweet Solus Prime! It's like nothing I've ever seen before."
"That's really saying something." said Crosshairs.
"Drift, you take a look at this." said Hound. Drift looked into the telescope and saw it, too.
"It is beyond my comprehension," said Drift, "however I sense a foreboding nature to it."
"We must activate the spacebridge and return to Cybertron to investigate." said Optimus.
"Yes, Brother." said Megatron. They activated the pillars again and warped to the metal world, on which they had not set foot for years.