Based on what I've read so far, this has got to be some kind of "You guys broke space/time and so the higher powers have to step in to make things right. Here, this angel is going to police you dumb monkeys to make sure you do the right thing." Combined with everything happening in Avengers and New Avengers this could be some path toward introducing agents of the Living Tribunal into things to make the cosmic side of Marvel bigger.
Loved the first issue. Also loved that Marvel let those release parties happen, which allowed my almost-3-year-old son to dress as Iron Man and get a picture taken with Thor, Hawkeye and Captain America. Very cool.