Boy, big crossovers make you realize something:
we don't need all these extra characters cluttering up the DC Universe!
Time for that cross-company yardsale that the Absorbascon and Seven Hells like to call "Character Donations". Let's clear out some excess baggage, characters who aren't need now, certainly won't be needed after IC is done, and that Marvel might actually get some good use out of.
How about ... Doomsday, Conduit, Ruin, Bane, Hush, and Azrael?
All of them are "Living Plot Points" more than actual characters and, if there's any kind of retconning that comes as part of Infinite Crisis, the plots they are part of probably won't remain in continuity. DC can do without them (in fact, is doing without them already).
Marvelish names. All of 'em. And they could be fun at Marvel. Doomsday could be the social director on Monster Island. Conduit's your basic mutant freak (fess up; you don't even remember Conduit, do you?), Ruin and Azrael are all about the armored costumes, and Hush, well, Marvel doesn't have a mummy guy, whereas DC's got Negative Man and the Unknown Soldier.
Heck, at Marvel you could band them together as, say, the "Superfluous Six". They could have an annual meeting to decide which hero/antihero to pick on, and then hack away at him for a year in yer basic Marvel "trial by fire /test of character" storyline.
Free the Superfluous Six ... to go to Marvel!