The Milestone Comics characters are going to return, and they will be integrated into the DC Universe.

clipped from www.newsarama.com
NRAMA: You said that Dwayne is going to be starting this reintroduction in Justice League - what about the rest?

DD: You’ll be seeing other characters show up in other series. It’s going to be very organic and very natural in the way that we bring them in.

Also – we will be working on a couple of other levels with Dwayne on this. We will be collecting the old Milestone material, and reissuing that in trade paperback form over the course of next year, and also, we’ll be working with Dwayne to do a wrap-up for the original Milestone series for the way it was all presented. He had a concluding story that we want to work with him on, and that will be an out of DC continuity story, but completely within the original Milestone continuity. That way, the fans of Milestone from years back will be able to get that ending story that brings that original history and world to a close.
  blog it