The Prophecy

The Prophecy is an ambiguous prophecy which involves The Egg and will somehow grant Princess Peach world domination if it succeeds. The exact parameters of The Prophecy are unknown. The Prophecy was broken when Wario merged with The Egg, an act which disestablished space-time. As a result whatever The Prophecy was prophesying did not come to pass.

Theories

 * The Prophecy may have included Mario fusing with The Egg instead of Wario. This has been speculated because Mario wears a purple hat similar to Waluigi when attacking The Vault.