After engaging Soundwave in a fight Soundwave uses his Space Bridge powers to transport Optimus to another universe. The Transformer's Animated Universe to be exact. The Space Bridge closes and Soundwave shuts down into deep stasis after expending his energon reserves to the limit that nearly took his spark with him. Optimus is trapped in Detroit. (This Upgrade Optimus Prime after the events of Darkmount on Earth and after episode 3 in TFA.)
Optimus flew through the portal as he was tricked by the eyes of the Decepticon, he grunted as he landed, his thruster's cooling down. "Ratchet, I need a Ground Bridge." There was no response but someone in the sky would notice.
The guy was in space, "Someone requesting a ground bridge. Definitely an Autobot." He smiled as he came in from orbit and towards a ceremony for the Autobots. The military would take notice of this and started to fire upon the Cybertronian.
He flew through the sky and up into a cloud as he scanned their jet and incorporated it into himself. He then shot the jet out of the sky and watched it burn and explode as he through the smoke.
He transformed into a jet and flew towards the parade as he appeared next to the planes which were planned for the ceremony. Bumblebee looked up at the jets and smiled, "Finally something that flies that isn't a Decepticon."
Issac looked up at a seventh jet and had a look of confusion on his face, "I thought I only paid for six jets." As Issac spoke, the seventh jet suddenly split from the group and flew towards the onstage Autobots.
He transformed and fired its blaster at the Autobot causing dust and spoke to follow after the explosion. Optimus, Ratchet, Prowl, Bumblebee and Bulkhead got slammed into a train as the attacker landed, "Greeting Autobots, Mind if I crash the party?"
Optimus spoke, "A Decepticon here?" Starscream a little annoyed yelled, "The name is Starscream. Exsulted leader of the Decepticons."
Primeverse Optimus watched as Starscream announced himself. It was all he needed as he watched Prowl run at Starscream as Starscream flew up. Primeverse Optimus flew at Starscream as Animated Optimus watched as Primeverse Optimus flew above Starscream.
Starscream turned around too late to see big Optimus Prime above him and be punched into the ground, knocking Starscream out. Optimus landed as Bulkhead looked at him confused, "An Autobot?" Animated Optimus spoke, "An Autobot, I've never seen."
He looked at Starscream confused. He looked different as Prowl walked to Optimus still on guard. "Who are you?" Optimus turned to face Prowl and spoke, "I am Optimus Prime!"