i haven't watched this film but i got many spoilers from YouTube & insta & quora so i know that this film is good but still Shanks didn't fought that much, he fought Kizaru & defeated him but his advance conquerors haki wasn't much of a problem for the admirals so now we know that his advance conquerors haki is something great but not enough to defeat an admiral & the animation was fire i mean real good, Luffy's Gear 5 was shown too & Shanks & Luffy fought together against some villian or whatever idk exactly.
After seeing some reviews of other people i guess this film is a 7/10 which is actually good.