I just remembered that we almost had a battle-zone like this (KMC Marvel vs KMC DC). I actually think that focusing on specific characters (Avengers vs JLA) makes it easier to organize. The problem I see is that less posters are here on a consistent basis.
I'm revising my stance on WBH after some heavy thought. I'd like input one way or the other concerning my decision, so long as it's pretty civil and constructive, which given the people involved so far, I'm confident we can do. Hulk's power level, by nature of his character, is variable, with most "Savage" incarnations being looked at as a definite herald class character when it comes to physical might. Given that's all he has, I don't think I can ban WBH outright, especially when I already stated that so long said amp doesn't go beyond a single level "bump" from their original starting point in power, it's good to go. Personally, I don't think WBH is above Trans (maybe just in strength/durability) and considering the strong arguments you can make for High Heralds beating WBH or giving him a good fight, it would be unfair to handicap Hulk, especially when with the rules you could in theory amp any number of characters I could name to levels that would be more formidable than WBH and still be within the rules.
I'm certain this may raise specific questions regarding scenarios involving potential character draft picks, so, please, feel free to PM me if you have any questions concerning power levels or rules in general.