Look we are jumping the gun I just had a thought. If the HB superheroes are joining the DC universe before Crisis than Hanna Barbera would probably make a Crisis on infinite earth's cartoon miniseries in the 80s (which will deviate from the comics)
- Considering Ralph Dibley, and Ray Palmer have taken the identity of Plastic man & Dollman it makes more sense to make the Golden age versions part of Earth 2s All star Squadron instead giving them their own world
- The Dell/Gold key earth Earth-X
- Split HB into 2 earths (with Yogi and gang part of Captain Carrots world)
Makes sense to me. Certainly makes things a lot more streamlined in that regard. And yeah, Actual heroes on Earth-HB and Anthro Animals to Earth-C, unless accompanied by a Mystery Solving team like Jabberjaw and Scooby-Doo in which case, Earth-HB is their home. A lot of things are going to change down the line. DC is definitely going the ''Hard Sci-Fi'' route here.