The new Marvel Heroic Roleplaying game might be a good fit. It sets its goals on emulating superhero comics rather than superhero physics, and thus (IMO) avoids the common superhero RPG problem of having to precisely define every aspect of a character's power set. But it's hard to say without knowing more about what you're looking for.
Hm, let me see if I can explain more of what I am looking for.
I want an epic game, but not straight out the gate. The players have to feel like they have a part in this, not just something that happened to them...but that is more on me then it is the system.
I want an element of danger, like this isn't your normal DC. Death should be a concern, but not at first. If the players feel death is the only option for themselves/the villains, then it is an option. Although this should only be in the most dire of circumstances/fitting to the story.
As the story progresses so will the difficulty of the antagonists to the point of cosmic. So starting out, as rookies let's say, thugs won't be too much of a problem. As the players progress, they will find the villains are more cunning/dangerous/deadly.
Power Rings, of all colors, will be something I will need to be able to create.
I want character creation to be fun and allow the players feel like there is room for creativity. I don't want them to be bogged down by large amounts of number crunching in creation/combat.