WARNING: The following contains spoilers for Inferno #1, available now from Marvel.
One of the most important positions on Krakoa is that of the Great Captains, which falls to four experienced mutant soldiers. They've remained in relative peace with one another across the First Age of Krakoa, despite the tensions boiling over elsewhere across the island nation. But things might just get a bit more complicated for them going forward.
In Inferno #1 by Jonathan Hickman, Valerio Schitti, David Curiel, and VC's Joe Sabino, Bishop becomes the new Captain Commander of Krakoa. But given his recent actions and teasers indicating he may be a traitor to Krakoa, this might quietly be a bad sign for the future of Krakoa.
The Great Captains of Krakoa are considered the military leaders of the mutant nation. While Krakoa doesn't have a standing army, the sheer power of their populace makes it relatively easy for them to rally and defeat imposing enemies (such as their arrival on the battlefields of Otherworld during the finale of X of Swords). Each Captain was in charge of a unique aspect of command: Cyclops ranked as their overall leader and Captain Commander. Magik worked with the younger generation in New Mutants, while Bishop (in his capacity as the Red Bishop) served as the defensor for the Hellfire Trading Corp. Gorgon served as the chief protector for the Quiet Council -- until his demise during X of Swords, which resulted in his resurrection only restoring his body but not a clear copy of his mind and memories.
This means that a new member of the Great Captains must be named -- with the position falling to Psylocke, seemingly fresh off her time with the Hellions. But with that process already going through, the Great Captains decide now is the perfect time to install some other changes as well -- namely, announcing that Cyclops is stepping down from his position of power. While he is still a Great Captain, his current role as the leader of the newly reformed X-Men means his attention is too divided to serve as the main leader for such an important group. Instead, he transfers the position over to Bishop, who -- in a ceremony conducted by the Quiet Council -- accepts the position and vows to serve Krakoa well.
On paper, it's a great decision. Bishop's experience in combat from his time in the future, as well as his long service with the X-Men, make him a valuable leader and skilled soldier. His connection to the Hellfire Trading Corporation as well as his longtime position among the X-Men gives him plenty of experience working with both the heroic team and the more morally complex corporation. He's also earned the loyalty of his allies multiple times over -- although his record isn't perfect and should give Krakoa some pause on his rapid promotion. During the Messiah Complex crossover, Bishop betrayed the X-Men and attempted to assassinate the infant who would become Hope Summers out of hope that doing so would prevent his dark future from coming to pass.
Meanwhile, he's been manipulated by others at various points -- and even in the current era of Krakoa, has shown a willingness to ignore the orders of his nominal leader in lieu of following secret motivations. During the events of King in Black, Bishop was part of Kate Pryde's party as they made their way to New York to confront the Knull-corrupted Cyclops and Storm. While Pryde wanted to rescue them, Beast secretly convinced Bishop that Krakoa didn't need to handle the public blowback of two major mutant figures becoming corrupted -- and that given the chance, he should just kill them and resurrect them on Krakoa. The fact that Bishop was willing to do so despite Pryde's orders is worrisome enough, suggesting he'd be fine committing some acts of war behind the back of the mutant government.
Bishop also suggested off-hand that the Five's capabilities could allow them to combine mutant powers -- accidentally predicting the eventual creation of Chimeras, genetically modified mutants who in one of Moira X's timelines led to the ultimate destruction of the Krakoa power base. In his new position, Bishop could wish to revisit those ideas and inadvertently put himself on a path towards Mister Sinister (and, in the process, enrage Tarn of Arakko -- who has made an enemy out of Sinister). Bishop might have the right skills for the position, but recent events on Krakoa -- as well as the teaser that suggested Bishop could eventually betray the team -- suggests he may be a more dangerous choice than anyone truly realizes.