I have a small spoiler only.
-After Roger found the One Piece, the crew disbanded, and Roger turned himself in. Garp didn't fight against Roger, he simply cried. Roger had multiple children with different women, and Garp knew that. Garp then decided to secretly hide all other children except for Ace. Oden returned devastated to Wano, only to see his once beloved country to be destroyed and turned into hell. Oden looked up into the sky and saw a big dragon, that was rampaging through Wano.