I’m thinking of Jet Li’s Hero. It’s totally decent as a movie, but I think it’s almost un-rewatchable. Not because the ending is known, but because of the super long flashback scenes. Many of which focused on long, colourful, extravagant, not really even relevant to the story, scenes.
I think the movie would be much more rewatchable if all that time was spent on
spoiler
the standoff between Jet Li’s character and the king and things like that.
That’s okay.
Relevant to the topic some movies I think are infinitely researchable would be the original two Ghostbusters movies, Clue, Rocky Horror Picture Show and Jurassic Park. Couldn’t think of any modern movies off the top of my head.