That means all those early adventures in Detective Comics "really happened" (let's not get into an argument over what that means in a comic book). The movement to reclaim every character ever published by DC continues. Does Police Chief Liza Warner know Captain Maggie Sawyer or Patrolwoman Diane Meade?
And I thought a universe in which Kathy Kane and "Kate" Kane (does she know Sawyer?) both exist was odd. I can hardly wait for the first Zook / Lobo / Thorn team-up.
Talk about an infinite crisis.