Not bad. Multiverses are always good, but we should make sure they're specifically defined in regards to WHO is in what universe.
Example, my story where the Actor fights the Sports League is, as far as this idea is concerned, it's own canon/universe by now. If I want to bring others in or have them submit characters, I should probably make a seperate thread for it and make sure I have their consent.
I think the greatest strength and weakness of the multiverse idea is that is relies heavily on the collaborative efforts of all parties who want to be involved. With proper planing it could lead to very fun stories; it could also lead to massive headaches. I still believe in it though. We're all supercool people here.
I've also come up with some ideas to address the issues presented by Evan.
1. The different world can "echo" between each other.
-"Echoes" can be defined as subtle hits and references that different worlds exist, without going into crazy crossovers.
-Example. The ideal setting for "The Royal Pain" team may be a bit more extravagant then the setting for "The Unreal" team. Royal Pain would "echo" into the Unreal's world by way of being a saturday morning cartoon or comic. One of the Unreal might notice the Royal Pain comic /cartoon and think, "Man what is with these ritzy assholes."
-Alternatively, to get a little more complex with what we can do with echos/crossovers, we can have situations like this: The Unreal, having completed sever high profile investigations, gets contracted to have their likenesses featured in the Royal Pain comic/cartoon. In this comic/cartoon the two teams fight. In the Unreal canon, this is all just a silly situation that happens and nothing of major consequence goes down, because its just a comic and "not real." However, in the Royal Pain world, this is actually happening and the end of the crossover has genuine consequences good or bad for the Royal Pain cannon. This lets of have fun with each other characters without the possibility of unnecessary complication with those who want very specific settings. Also it lets the reader not have to worry about following the various stories, they can just stick to one and not worry about complex crossover cannon.
2.An Avatars history/age does not have to linear.
-This idea is still a little fuzzy, but it may work.
-Example: We have a character thats a doctor. This doctor character is featured in multiple sorties with varying settings,some very realistic, some very fantastic, some science fiction, some old west. For the most part this characters personally is the same and they look about the same age in the different stories. The best parallel I can think of is Cid from final fantasy. Same name, same basic personality (usually), but exists in different worlds.
If any of this does not make sense let me know.