Deathstroke

An ordinary civilian was hiking close by when a spaceship crashes overhead. While exploring the ship it took off to another galaxy. The civilian not prepared for the take off fell back on the console erasing the flight log and location of Earth. So now the civilian must explore this new galaxy while searching for a way back to Earth. But will they want to return home?

So, a former soldier in the real world accidentally gets electrocuted while reading a Fandom page about his favourite DC character Slade Wilson. When he woke up, he found out he had got all the augmentations Slade Wilson wka Deathstroke had together with all his experience. His injury was healed and he had become a badass fighter. Only, there was no way he could go back to the military and continue his career so he had to start small and build up his reputation as the deadliest bodyguard/bouncer there ever was.