IMO the only Re Games that needed a remake are 1,2,3,5,6. The first two because they are really old and could use and update and the rest because they were either rushed or were trash. Outside of that, they should just reboot the franchise.
RE6 is fundamently broken at its core that a remake won't do shit. It needs to be completely changed, meaning they might as well make a new game instead of trying to remake 6.