First of all, I can now see how some people compared Oden to Takamura from Ippo! The resemblance is sound!
Secondly, I HOPE Oda during the flashback makes Mihawk encounter Oden. I don't care about anyone trying to undervalue Mihawk. Both of those swordsmen encountering each other is a bless to witness!
And lastly, I HOOOOPE if Denjiro is truly Koshiro (Zoro's master in dojo). That Oda actually intended for him to set sail to Wano by this time, and he arrives on critical situation to save Zoro!
I can imagine it already, the crew is in huuuuge problem during their fight! And is getting overhwhelmed, Luffy and Zoro being in uge danger, we have Jinbe appearing as back up to rescue Luffy. While Denjiro appears to rescue Zoro! That shit would be LIT!
Note: Sanji doesn't need saving, only Zoro does LOOOL
Just kidding, but if all members in their own different areas of battlefield are getting destroyed, it would be nice to have a nostalgic name appears to save their ass in a critical moment.
Anyway, let's hope if it's really Koshiro, Oda does NOT neglect him and say "well, Zoro takes his place" because Koshiro does NOT KNOW about Zoro being there to defeat kaido. Instead, he himself has obligation to appear and make the promise they had for Oden and Toki of opening wano borders true. SO, it's more appropriate that way.
Also, this would be a huge chance for Koshiro to witness Zoro improvement where Oda makes Zoro surpasses his master (I know some think he already surpassed him, but we don't know that lol)
Oh, I have a better idea, we have Garp saves Luffy instead of Jinbe, and Jinbe saves Sanji since both of those guys actually teamed up before and both have some sort of chemistry together. BUT Luffy needs to witness Jinbe appearance anyway. Since it's a battlefield, everyone might be witnessing everything anyway