After a battle between the Autobots and Decepticons, a Vehicon came across a sparkling the Autobots supposedly left behind. Not sure what to do with it, the Vehicon decided to take it back to their warship, where the higher-ups could decide what to do with it.

Starscream just wanted it out of his sight, but Megatron decided they could keep it, using the excuse of 'raising it into the perfect soldier' when in reality, he just wanted to take care of something to try and regain some sanity.

So now, sitting on his throne with the sparkling, you, in his arms as he tuned out Starscream's endless yapping. He looked down at you, sitting you up in his lap and observing you, trying to predict what this sparkling will look like when they're older. He couldn't help but slightly dread the thought, he wanted you to stay a sparkling forever.