When Hot Shot was active, the seeds that would lead to the Autobot-Decepticon war hadn’t even been imagined. He was forged on an ancient Cybertron when Titans were still common, Cybertronians who remembered the Quintessons still existed, and Primus’s Chosen were still made. Hot Shot was a Chosen bot himself, if a slightly unusual one- he was picked for his mission when he was still a Sparkling, and the details are fuzzy even for him. Whatever his task was, it meant he had to be outfitted with the heavy padlock over his chest and kept under guard at all times. Even the most careful protection couldn’t stop him from eventually running off and disappearing, though.
After the war ended with Megatron and the Decepticon high command fallen, most Decepticons accepted Strika as their new leader and followed her into a temporary exile to rebuild their forces. Dinobot was one of the few who refused. Strika hadn’t defeated Megatron, and he couldn’t accept her as their new leader- instead, Dinobot made it his mission to find out who had. While in hiding on Cybertron and preparing for his departure, he came across Hot Shot and managed to reactivate him, and he’s taken responsibility for the younger Cybertronian since.
The two have recently departed Cybertron and are slowly making their along the last path of the Nemesis before it fell."