I don't know if I'd say there's much that can actually disqualify someone as being a Superman fan(although only being a fan of the Injustice version comes close), but I don't know how I feel about fans who only got into the character after the New 52 and Man of Steel and are the same people who were saying he was corny, overpowered, outdated, unoriginal, only a few years ago and have responded with revulsion over the pre-Flashpoint Superman coming back. It just seems disrespectful, but they still have the right to call themselves fans, I guess.