Warning: spoilers ahead for Legion of X #2!
Cain Marko is the Unstoppable Juggernaut, but one of his new teammates is a mutant who is stripping him of that title. After finally being granted a place on Krakoa by Nightcrawler, Juggernaut is part of Kurt's fledgling team of Legionaires. But during a mission gone awry, an unlikely mutant's gift turns out to be the perfect solution to save Krakoa from a mind-controlled Juggernaut rampage.
Marko, who has played both friend and foe to the X-Men, has been left in a strange limbo in the Krakoan era. While Professor X is his stepbrother and Black Tom Cassidy is his longtime partner, Juggernaut's nigh-unstoppable strength has nothing to do with an X-gene. Cain is no longer beholden to Cyttorak's will, but his non-mutant status means he still uses the Crimson Bands of Cyttorak and fragments of the Crimson Gem of Cyttorak to fuel his magic momentum. Now, through a vote by the Quiet Council, Juggernaut has been granted access to Krakoa in exchange for joining Nightcrawler's new squad.
Related: Juggernaut's New Partner Is Basically Guaranteed to Destroy His Mind
Juggernaut is a powerful asset to the peacekeeping Legionaires, but their current adversary Skinjacker makes anyone they possess into a potential weapon against Krakoa. In Legion of X #2, by Si Spurrier, Jan Bazaldua, Federico Blee, and Clayton Cowles, the Legionaires catch up to the mysterious Skinjacker only for the possessor to hop from Banshee into Juggernaut. Cain Marko is called the Unstoppable Juggernaut for a reason, so time is short before the situation rises to the level of a national crisis. Working on the fly and short on immovable objects to throw in Cain's way, the Legionaires discover one of their own teammates
Read more on screenrant.com