The story arc, written by Chris Yost, sees the Crimson Gem of Cytorrak return to Earth. The Gem has the ability to turn it's wielder into Cytorrak's emissary on Earth, the Juggernaut. It's presence is like a siren call to the last person to the most recent Juggernaut, Colossus, and to the man who called himself Juggernaut the longest, Cain Marko.
But they aren't the only ones after the Gem. Would be Juggernauts will be plenty, and it's up to the X-Men to stop them from claiming the Gem.
"The Once and Future Juggernaut" begins in Amazing X-Men #15, on sale in January. Check back tomorrow morning for our interview with writer Chris Yost.