I think the area that drive comics is the figures themselves. There are some great sets from Batman because he has cool equipment and a ton of money. Other books are more about the characters. What would be great is either mini-figs like the collectible series now or packs with 5-6 characters in each, similar to what has been done with Alien Conquest, Knights, and City. If there were packs like that with Superman, Lois Lane, Lex Luthor, Perry White, Zod, and Brainiac, I think they would be huge. Similar to Green Lantern, which I have stated my love for, have half of the corps in each set with a few other people like Carol Ferris, a Guardian of the Universe, a Manhunter, etc. That way there could be 5-6 people in each set and you could more easily collect them and let some sets like Batman be more about the vehicles. Think of Spiderman, Venom, Sandman, The Lizard, Green Goblin, and MJ in one pack. Another could be Fantastic Four with the 4 plus Dr. Doom. Watchmen! with the Minutemen in 2-3 sets! Moloch the Mystics, Big Figure, Dr. M, etc. Batman could have a Batman in each set and 3-4 baddies in each with him, Robin, Nightwing, Catwoman, Alfred, Gordon, Joker, Clayface, really, the list goes on and on...