How many Superhero books that are being published right now would be able to survive past 20 issues without taking place in the DCU or the Marvel universe? I've noticed that some people believe that it would be better for the genre if shared universes didn't exist. I'm not sure about that though. To me the biggest draw of modern comics is seeing different heroes and villains interacting with each other. To me breaking each character into different universes lessons these interactions, and would actually hurt a lot of characters. Some of the bigger characters (Batman, Superman, etc.) might survive independent of their respective universes, but in the case of those characters they have so many spinoffs and related books that they are essentially universes onto themselves. I look at a lot of indie Superhero books and notice that a lot of them are self contained non shared universe books, But yet you'd be hard pressed to find any indie superhero that have really lasted. and the few that have (Invincible for example) have adopted at least some of the trappings of the shared universe concept.