Parting Shot: Is It Possible to Make a Superhero Comic for Both New and Old Fans?

Uncanny X-Men writer Kieron Gillen blogs about the difficult balance involved in trying to write superhero comics that serve new and old readers simultaneously. This is a subject that was also much discussed in the context of DC Comics' New 52 relaunch, which was designed to reach out to a wider audience. What do you think? Is it possible for superhero comics to give both long-time fans and first-time readers everything they need in the same comic?