Oh there’s a ton of those, it’s hard to pin down just one that deserves it. i’ll probably come up with something now and then remember a better answer an hour from now, haha
The live-action Avatar movie could have been amazing had it not been directed by M. Night Shyamalan and casted more appropriately, that’s probably a weird answer but I wanted to stray away from talking about anime for once!!! Unless you consider Avatar an anime….
there are a lot of things that I feel had a cool concept but the execution just ruined everything, but of course now that I’m asked to talk about them I can’t really recall any