Flashbacks are pretty much 100% confirmed for this fight, and there are definitely going to be VoTE flashbacks in that mix. For sure and certain.
Nice prediction though! I am hoping for more hand-to-hand scuffles apart from giant monster fights though, but a super sized Rasengan/Chidori clash would be pretty beastly. And I think there might have to be a bit more off an explanation as to how Naruto suddenly goes into that Ashura state but I digress.