Would be nice, but I don't see how.
Maybe it'll happen automatically when the Diamonds fuse in order to decorrupt all gems on Earth.
- Steven discovers White Diamond has been gone for centuries
- No-one knew except for White Pearl
- When they find her again - a severely weakened captive in the hands of the Serpent People - they free her, but the Sneople destroy Homeworld in retaliation
- The Sneople have been waging a secret war against the Gems for centuries
- The Diamonds flee
- Cue a bomb where they travel from Gemworld to Gemworld, finding each is already desolated by Sneople forces which now attack with all their might now that their plan is revealed or about to be
- Finally they flee to the only world that escaped Sneople attention because it never produced Gem soldiers for the Gempire
- Hello Earth
- The only way to drum up enough warriors to fight for them is to decorrupt everybody