None.

Take the core, then do something different. I like how the Walking Dead took the original idea and then moved to go beyond one little house near a cemetery.

I say, no more reboots or remake, just continue on with the story if you must. Or, just start a new story.

I watched Last Knights(2015) last night. It was basically a retelling of 47 Ronin. However, it was given a mid-evil age look and background that was not in history. A whole new world and a different story, but with the basic type of ending. But, even the ending was different.

I will admit, that I do like some remakes, only in that they can use newer technologies for creating the movie.