An interesting detail I didn't immediately pick up on was during the battle between Oden and Kaido's forces, not one of Kaido's men used devil fruits. Not even King and Queen, his closest and presumably oldest subordinates.
Chapters 966-967. Part 2 of Oden's pirate adventure begins, and it's with the would-be-Pirate King, Roger. Roger benefited even more from this flashback than Newgate. Despite his ever apparent presence in the story, Roger has had very little of his actual character revealed to us at this point.
Chapters 964-965. Oden's journey with the Whitebeard Pirates begins. The comedic, over the top nature of the flashback still continues, as Oden reveals more of his personality. He is a lot more childlike and energetic, which I think do well of undercutting how much he wished to sail.
Chapters 960-963. The flashback begins, and we get our formal introduction to Oden. Oda has sowed our expectations for Oden long before his proper intro, and adds an extra dose of perception just before the face reveal.