Tale As Old As Time (Descendants)

Prologue

Once upon a time, long, long ago -like more than fifty years ago- a baby was born and a God planned to overthrow his brother, but was destined to be defeated by this baby, his own nephew. To prevent his downfall, the God sent his minions to dispose of the threat, but unbeknownst to him, they didn't succeed as he thought. Time skip about eighteen years and a series of 'heroic' events blah blah, the baby -now a young man- defeated his uncle, got the girl, and saved the day, blah.

Left to pull himself out of the main river of the Underworld, the God was bitter at his loss. He had never wanted to rule the Underworld, he just had gotten the leftovers while his brothers ruled the Skies and the Seas; while the rest of the Gods resided Olympus, he was left to dwell in darkness. His Wife, who could only spend half of the year with him at a time, wasn't even here to admonish his actions, as she was with her mother for a few more months.

As time passed and the daily work carried on, the God could admit that he might have acted rashly in his plot, and that the Titans were not a convenient method of conquering; While they were more muscle than mind at that moment, who knows what they would have done if they broke out of that single-minded rage. By the time his Wife joined his side once again in the underworld, the God was ready to put the failed plot behind. He was Hades, Lord of the Underworld and while his brothers still ruled the Skies and the Seas, his kingdom is where everyone eventually ended up.

Sadly while the Lord of the Underworld seemed to make peace with his failure, his brother Zeus, the Lord of the Skies and King of the Gods, did not. He was still furious with his older brother even years later and thought that his brother needed to face punishment for his actions; It didn't help that his son Hercules -who had since married the girl he saved and started a family of his own- had his adventure spread and retold, eventually becoming more exaggerated and construed than before.

While the God considered what to do about his brother, a formally Beastly King was in a summit with his royal council, announcing his proclamation for nationwide 'peace' in the form of confining every villain and their followers within the realm to a barren isle. As the council murmured of their various past experiences with the villains, the King, Adam, went further on to explain that not only would he be collecting the ones currently running around, but would also have the ones that were dead brought back to life; while this announcement brought mixed reactions, many of them had agreed that death was too lenient for their villains. When the Council meeting concluded Hercules, who was a part of said council, asked to talk with King Adam about how his 'villain' -being a God- would be trapped on the isle. As the King was about to reply, the Fairy Godmother urgently strode into the room and quickly recounted to King Adam -and by association Hercules- that when she was planning out the requests he had assigned her to do for the isle, a deity announcing himself as Thanatos the God of Death, appeared in her office. 

The God had informed her that even her own magic could not bring back the magnitude of people they had planned to do, and that even if she was able he would not allow it. The Fairy Godmother went on to explain that the God had informed her that if they wanted to continue this they would have to get the express permission from either of Thanatos' superiors, Hades or Zeus. The Fairy Godmother ended her explanation bringing to light that even if they were able to bring back the villains and have them on the isle, even her strongest Magicks would not be able to stably confine all of them AND strip them of their powers indefinitely. After a moment of tense silence, Hercules notified the two that he could convene with his father and see if he could agree to order Thanatos to revive their villains, and possibly provide a way to confine them with their powers stripped.

If you haven't figured it out yet, when Hercules went to Zeus about the King's plan and the Fairy Godmother's predicament, the God was more than happy to oblige. Zeus thought that it was a fitting punishment for his brother, and a compromise instead of sentencing him to Tartarus for a period of time. To further help them contain the various villains and God, Zeus commanded Hecate and Hephaestus to assist the Fairy Godmother with her task. The last thing that Zeus mentioned to his son was that the King would be required to have Hades' work sent to him on the isle, in part so that he would not consider it a vacation from his duties as Lord of the Underworld, but also prevent a power vacuum from forming with Hades gone.