What I'd like to see:

Since it's the 4th of July (Independence Day, if you're American) it occurs to me that I think it'd be really fun to have every single patriotic themed hero, (and ones like Wonder Woman who are dressed patriotically at least) team up in a single book.

It probably would involve punching a resurrected Hitler in the face a lot.

There wouldn't be a lot of plot, but I think it'd be fun anyway. :-)