Source
Newsarama
Marvel Comics has made it clear they're committed to Marvel Legacy being a game-changer for the Marvel Universe, and it all kicks off in September 27 with the 50-page Marvel Legacy #1 special by Jason Aaron and Esad Ribic, what they call the "single most important first step for any fan to jumping into" the initiative.
“Marvel Legacy #1 isn’t simply a history lesson,” describes SVP and Executive Editor Tom Brevoort. “Rather, it’s the starting gun to a bevy of mysteries, secrets, and revelations that will reverberate across the Marvel Universe in the weeks and months to come! No character, no franchise will be untouched by the game-changing events that play out across its pages. Jason and Esad pulled out all the stops to fat-pack this colossal issue with as much intrigue, action, surprise, mystery, shock, and adventure as possible!”
In addition to showing readers how Marvel history and continuity is “all connected,” the publisher promises the special will provide "shocks, twists, clues, and Easter eggs," set up the next year of Marvel storytelling and 53 MU series, and will feature a series of character returns, including "the most talked about return in comics."
Oh ... and the debut of the 1,000,000 BC Avengers - Odin, Iron Fist, Starbrand, Ghost Rider, Phoenix, Agamotto, and Black Panther - who come together for origin of the Marvel Universe.