Starter for @goateeofgood:
Optimus was in an intense battle against his enemies, the Decepticons. They possess both the Skyboom Shield and the Star Saber, which makes victory difficult for the Autobots.
But Optimus Prime is not a bot that gives up easily. Even with his enemies at an advantage, he continued fighting. His men were all on the ground, begging their leader to stop, but Optimus persisted. Unfortunately, the inevitable happened. Megatron, using both of his powerful weapons, managed to defeat the Autobot leader, leaving him in a pretty bad shape.
However, this wasn't enough for the Decepticon leader. To ensure that Optimus remained wounded until he died, Megatron ordered one of his soldiers to open a space bridge and send Optimus to a random location, so that he would be alone and with no one to tend to his wounds.
Prime ended up being sucked into the portal and fell into Crystal City, back on Cybertron. He lies on the ground, groaning in pain from his injuries.
"Where... where am I...?"
Everything seemed empty in the city. Optimus even tried to get up, but his injuries were quite severe, causing him to fall to the ground again. He continued trying to stay strong until he could no longer bear his injuries and fainted. He is still alive, but barely.