I have to assume that any wildly popular/famous story is still in continuity. That means of the recent Superman stories... Death/Return of Superman and the Johns / New Krypton saga. Other stuff like Electric Blue Superman, meh. I would assume that Knightfall / Knight's End still happened. That No Man's Land still happened. I just read Omac #1. One of the classic appearance New Gods was in it?! Does this mean that Final Crisis didn't happen? Because on the one hand it was a pretty unpopular story... on the other hand DC Golden Boy Grant Morrison wrote it.