I think there already is a divide, though I guess it could widen with Secret Wars.
You see it all the time on CBR. You often see older readers/fans of the older material complaining that they don't recognise the characters they grew up with/the current state of the MU is a joke/writers don't respect history/ etc.
I've only been reading for 10 years, there hasn't been enough time for my history to be ignored/retconned so I guess I'm a happy camper on the other side of the divide.