Put me in the camp that they should have restarted everything with a brand new Earth . . . some stuff might be the same, like Superman = Clark Kent, and Bruce Wayne becomes Batman after his parents were killed when he was a kid. But no "five year window" crap where they maybe / sorta keep some of the old adventures in new continuity. The old Earth / old continuity should have just been frozen and put in cold storage until somebody decides to revisit it (sort of like when they had Flash of Two Worlds in the Silver Age).