User blog comment:Hatebunny/The DCnU, and why we have not made new pages/@comment-5135595-20120620201849/@comment-3361105-20120620203124

If you're going to start reading the DCnU, start from the #1s. Flashpoint altered the timeline, as indicated by this handy infobox:

So, as a result of those changes, lots of things have been retconned. So far, there is still a multiverse, but as yet, we only know about three or four earths, and for the most part, they are different from the versions that we've seen before.

DC is obviously treating The New 52 like a new universe, but we chose to keep things as New Earth, because in-universe, they were still New Earth characters when the thing first started. Now, we're starting to change our minds (but it is going to take a lot of work, and we're still working on getting a unanimous decision on it). In any case, SOME characters have most of their histories intact, like Batman and Green Lantern. Others have NONE of their history intact.