Cybertron — TFP

After the end of the war between the Autobots and Decepticons, everyone began to live peacefully, and after a while, Bumblebee's team returned.

So everyone is walking the streets of the restored Cybertron when an announcement is heard

Head of Security: ATTENTION! ONE OF OUR MOONS IS MOVING TOWARDS CYBERTRON! I REPEAT, ONE OF OUR MOONS IS MOVING TOWARDS CYBERTRON! Everyone, prepare to evacuate!

Optimus Prime, Bumblebee, Ultra Magnus, Smokescreen, Wheeljack, Ratchet, Drift, Strongarm, Sideswap, Fixit and other Autobots and Minicons, as well as former Decepticons such as Knockout, Soundwave, Shockwave, Starscream, Megatron, who returned from exile, and others hear this

Suddenly they hear a low frequency noise from the collision and Primus' scream from the core (which is what he is), and then the Autobots and Decepticons lose consciousness and fall to the ground

And six hours later, they all come to on a huge flagship, lying in one very large cabin, lying on platforms. Through a huge panoramic window, they can see Cybertron, with pieces of one of its moons floating around it, the surface itself destroyed right down to the core.

So everyone has unexpected guests