During the Marvel presentation at the Diamond Retailer Lunch at San Diego Comic-Con we got to see a first look at Marvel Legacy #1 by Jason Aaron and Esad Ribic.
Retailers have been told that the comic will have an "oh shit" last page that people will be talking about for months to come. And, as a comic book, it'll will be chock full of Easter eggs. Not literally of course, that would be hideous…
Legacy will take us from the beginning of the Marvel Universe to the present and into the future. And retailers will get an advance look at the comic a week before it's out.
So no way that will leak then.