>>48879822BW2 is the one that deserves a remake because of the content.
BW1 could work with an overhaul because it's so dialogue heavy. People don't realize how much different it is from DPPt because the character sprites were composed of separate moving parts and the 3D modeling was far more prominent with things like a rotating camera in Castelia City. HD2D wouldn't make sense because the game was pushing 3D on the DS.