The Return
Somewhere in the distant future.
In another galaxy, meant only for the souls of the passing, Khalid was standing in front of an old man, laying on the ground, and gasping for air. The old man was the oldest amongst the guardians of hell, and he was taking his last breaths.
He gazed up to the gates of hell, watching more of Hades' soldiers of evil souls come out from their lair.
Khalid had successfully killed each and every one of the guardians of inferno, thanks to his accumulated powers and Hades' knowledge of their weaknesses. Of course, Khalid died several times in the process, but it was thanks to his form of immortality that he came back to life each and every time.
Finally, Hades had come back for his followers. It had been decades since Hades escaped hell, fleeing after a guardian fell into his scheme and granted him passage back to earth.