I do not own Avatar: The Last Airbender or anything belonging to the Transformers franchise. Stellar cycles = how long you want it to be (as long as it's a very long time away).
Cybertron, once a planet able to be inhabit the lives of its robotic inhabitants, the cybertonians. Now an empty metal because of a war between two factions: the Autobots and the Decepticons. A war that has lasted for countless stellar cycles between the two factions for control of Cybertron with countless energon spilt. Now there is nothing left for each faction. Now, the leader of the Autobots, Optimus Prime, has called for a mass exodus for all Autobots to a planet called Earth. However, Prime's former best friend and leader of the Decepticons, Megatron, has discovered their plan and will try to stop them.
Aboard, the Ark's bridge Optimus Prime is sitting down on the captain's seat. Like all of the Autobots with him, Optimus feels upset about the prospect of leaving the home he has known for countless stellar cycles, but knows this is the right thing to do. With him is his old friend and medic, Ratchet, former wrecker, Bulkhead, and the scouts, Arcee and Bumblebee. The Ark was now in the same solar system as Earth was.
Just then, a space bridge portal opened up to the right. A menacing looking space craft approached. It was the head Decepticon warship, the Nemesis.
"Optimus, the nemesis has appeared." Ratchet said from the control panel.
"Megatron." Optimus growled, knowing that the Decepticon leader is about to attack it.
Megatron sat aboard the captain seat smirking, knowing that he could end the war now. With him were his second-in-command, Starscream, his communications officer, Soundwave, their medic, Knock Out, Knock Out's partner, Breakdown, and countless vehicons.
"Your orders, Lord Megatron?" A vehicon on the control panel asks.
"Fire." Megatron ordered.
The Nemesis began to fire rapidly at the Ark.
"Evasive maneuvers!" Optimus ordered.
The Ark took the hits from the Decepticon warship causing damage.
"Ratchet, turn on the defensive shields." Optimus ordered.
Ratchet turned on defensive shielding.
"Optimus any ideas?" Arcee asked.
"Ratchet return fire." Optimus said.
"Understood." Ratchet said.
The Ark used the back weapons against the Nemesis. The blasts didn't cause as much damage as the Nemesis did though because it had its shielding on. Each of the ships began to fire at each other until one of the ship's lost their shields. When the shielding was low enough, both sides charged their weapons. Until, an asteroid struck the ships causing an explosion to one of the engines of the ships.
"Optimus we've flown into the Solar System's asteroid field." Ratchet said.
"Optimus, the shields are now at fifty percent and keeps going down. Our engine is significantly damaged too." Ratchet said.
"We must do our best to avoid any more asteroids, or we'll fail." Optimus said.
The Nemesis, however, was taking much more of a beating, due, to its much larger size.
"Lord Megatron, we have entered an asteroid field." A vehicon said.
"I want all power put on shielding, send in a repair crew to fix the engines, and I want thrusters on full charge!" Megatron demanded.
The shields were at much higher levels than before. However, the ship's gigantic size made it difficult to avoid any asteroids. The ship started to shake as asteroids pelted it. One tremor caused Starscream to land on Megatron.
"Get off of me, Starscream!" Megatron demanded as he threw Starscream off of him.
"I'm sorry lord Megatron. Might I suggest using the escape pods?" Starscream apologized and advised.
"The escape pods will move to fast and are vulnerable to collision." Megatron said.
Just then, a ginormous collision happened at the back of the ship. This blast caused the Nemesis to lose a significant amount of its shielding. The only thing they could do now was guide the ship.
"If we are to go down. Let us, take the accursed Autobots with us." Megatron said.
Both sides were out of the asteroid field. The Decepticons had to wait until they passed Mars in order to fire their weapons. The Decepticons let out a charged ion blast. The blast hit the Ark's only other remaining engine. Megatron smiled now knowing that he had destroyed the Autobots, and Prime, even if it meant he would join the all spark too.
"Optimus! Our other engine is gone what do we do?" Ratchet asked feeling worried.
"Do we have any remaining shielding?" Optimus asked.
"Since we've left the asteroid field, the shields have been charging. It's at twenty five percent." Ratchet said.
"Which means?" Bulkhead asked.
"It means we will not go offline and be put in emergency repairs for who knows how long." Ratchet says.
"Try and steer us as far away from the Nemesis as you can, Ratchet." Optimus said.
Ratchet agreed and began to turn the Ark away from the Nemesis as much as he could. The Autobots took a last look at the Nemesis as it began to plummet downwards somewhere. The Autobots looked at where they were going to plummet. It was a gigantic mountain; wide enough to fit the entire arc. Team Prime closed their optics as a way to shield themselves from the crash. The ship no longer had any shielding and power. Inside were the bodies of the Autobots, in emergency stasis, but for how long?
And that's the first chapter of the story. I hope you liked it.