Marvel Comics #1000 2nd Ptg Buckingham Var

There is a mystery that threads throughout the Marvel Universe — one that has its origins in MARVEL COMICS #1 and which unites a disparate array of heroes and villains throughout the decades!  What is the Eternity Mask, and who is responsible for the conspiracy to keep it hidden?  And what new player will make their startling debut as these secrets are peeled away?  Featuring the entirety of the Marvel Universe of characters!