In terms of movies the worst offenders are remakes of foreign films for the US audience. Like the Oldboy remake was completely unnecessary and it changed key parts of the story. Funny Games was just a shot-for-shot remake of the original one!
Personally I'm finding the video game remakes even more egregious than the movie/tv remakes. I think it's a side effect of the modern day development costs being so out of control but as long as people keep doube - and triple - dipping on games this is going to continue.
