Whatever happened to Jinx? It'd be cool if he joined the Braddock Academy or something.
Anyway this is hard but, you have to wonder if some of the old Midnight Sons aren't too busy with the Legion of Monsters, also I would rather that Dr. Voodoo played the role of Dr. Strange this time around, seeign as Strange seems to busy with the Avengers:
2. Ghost Rider
3. Elsa Bloodstone
4. Werewolf by Night
5. Daimon Hellstrom
6. Black Knight
I figure Spitfire would want to remain on MI:13 doing government work, Hannibal King has vowed never to use his vampiric powers again, Frank Drake has been indefinitely hospitalized, and a bunch of super natural heroes have been divided between MI:13 and the Legion of Monsters. I figure this could have a rotating roster initially, before finally settling to a core few.
I would like to see the original Midnight Sons together once more though....I think they have been marked as the official Midnight Sons, so that would definitely need to be addressed before a new team was assembled.