People never saw the original game doesn't mean the game is new. With that logic then Dark Souls Remastered is a brand new game eh? nope just a remastered of the original game and has some minor changes and WoW classic doesn't even have those minor changes except the slightly better visual HD option.
With that logic then Naxx raid in Wotlk is a brand new raid content because very few ppl saw and raid it during vanilla? see? how wrong this is?