If DC ever decides to expand it's multiverse beyond the 52, what ideas would you like to see incorporated into the multiverse? If you could design the multiverse, what concepts would you come up with?
Here are some of mine:
Realistic Earth: There are no super powered beings here. It's only comprised of non-powered heroes like Batman, Green Arrow, non-powered Canary, maybe Wildcat, and every other non-powered hero in the DC pantheon.
90's Earth: The heroes here are all nineties versions. Mullet-married Superman, Tim Drake Robin, Kyle Rayner Green Lantern, Wally West Flash, yellow oval Batman, Conner Hawk Green Arrow, Oracle Barbara Gordon, Watchtower on the moon, etc.
Pre-Crisis Earth: This is the world that might have existed had the Crisis never come about. Superman was a flying super-baby who grew into Superboy and was a member of the Legion as a kid, Dick Grayson is still a member of the Teen Titans, so is Cyborg, Donna Troy and Starfire, possibly a Jason Todd Robin, Batman is leader of The Outsiders, the Justice League is comprised of Vibe, Vixen, Gypsy, Zattana, Steel, and the roster circa 1985, Clark Kent is a broadcaster for Galaxy Communications and so is Lois and Lana, and the original Kara Zor-El is still alive.
Golden Age Earth: On this Earth, Superman can only leap an 1/8th of a mile, Batman drives a red roadster and has no Robin, and the most powerful beings are Alan Scott Green Lantern, the Spectre, Dr. Fate, and Zattara the magician. Technology is stuck sometime in the late '30's or early '40's.
Banned Earth: On this Earth, super-beings are outlawed due to a massive explosion that destroyed a major city. Superman, Green Lantern, Flash, Wonder Woman, all went into forced "retirement". Batman never retired but was eventually killed trying to get away from the super-human task force designed to enforce the ban on super-heroes.
I could do this all night but those are the ones that interest me the most. What ideas would you like to see if any more worlds are added to the multiverse?