I was recently watching Rogue One, and while I don't think its a bad movie, if it had not been for that spectacular final 30 minutes, I don't think it would be worth a recommendation. I mean for the majority of its run time I'd classify it as "fine", but that last battle really added some much needed life that was missing from the film.
So what film felt like it was dragging its feet for the first two acts but then kicked it into high gear once the third act rolled around?