Prediction, 10 more chapters for flashback, I think:
Chapter 961: Oden resolved thee mountain God incident. Kinemon and Denjiro followed him. Oden meets 2 more scabbards in another incident.
Chapter 962: Oden resolved the incident in 961. He gains to more scabbard followers. Oden meets 2 more scabbards on another incident.
Chapter 963: Same as 962 with different 2 scabbards.
Chapter 964: This time he meets 3 scabbards on another incident.
Chapter 965: He resolved the incident on 964. And he now have 9 scabbards! He successfully sailed out of Wano in the end with Inu and Neko.
Chapter 966: Time with whitebead skimmed. He met Roger.
Chapter 967: Time with Roger.
Chapter 968: More time with Roger. Return to Wano. Scabbard Reunion. Toki. Daimyo of Kuri.
Chapter 969: Momonosuke birth. Peace time. Kaidou incident.
Chapter 970: Death of Oden. return to current timeline.
I want to know when he learnt how to read poneglyphs because he was rowdy as a teen. I can't see his father who disowned him passing on that knowledge.. I hope there's a chapter about that.