Owner of incredible strength Hercules liked to challenged himself, fighting the Nemean Lion or question for the Golden Fleece were some of the many challenges he completed.
When Fin Fang Foom launched a globe wide attack using various mind controlled monsters, always up for a challenge Hercules decided to take on the monsters. At that time he became a member of the Avengers Academy who were also fighting the monsters, and where his half brother Ares was already a senior combat instructor at.
Hercules, his friend Amadeus Cho, and the Champions battled against the Chaos King to keep the evil god in its own dimension, since it was trying to break out of it, to turn their world into chaos and devour it. The heroes were able to stop the god, but just as temporary measure, since they believed he was getting stronger, and they wouldn't be able to stop him from breaking out in the future.