One more reason why this is Oden:
We are in Oden's flashback in Anime!
I have been noticing many times that by the time Anime reaches a certain point, the manga highlights something or reveal something about it with new stuff...
Meaning, following same pattern, if Anime studio is about to reach the execution parts, and traveling to future parts...etc... then Oda in manga will try to explain some stuff regarding that incident!!!
Meaning, rather than Studio in anime to fuck thibgs up, the manga will clarify something first before we get to that point in anime... where maybe a small detail is there in manga panel is crucial...
Anyway, if you want me to provide evidence that Manga/Anime have been working together syncing their events, I can provide you with many examples where Manga chapter reveals something, and same week anime episode is about same topic hinted at long ago!
It happened many many times