WARNING: The following contains spoilers for Hellions #4 by Zeb Wells, Stephen Segovia, David Curiel, and VC's Ariana Maher, out now.
Both of Marvel's Civil War events might revolve around conflict within the Avengers but the X-Men are at odds with each other even more frequently. Philosophical and moral debates among mutants have been an essential part of the franchise since its creation, with the classic dichotomy between Charles Xavier's peaceful methods for achieving mutant rights and Magneto's more aggressive ones being the most famous example. Over the years, other ideologies, like Apocalypse's particularly extreme one, have emerged.
X-Men history is full of storylines in which characters have switched allegiances for what they believe is the good of mutant-kind, such as when Colossus joined Magneto's Acolytes or when Bishop tried to kill Hope Summers. Additionally, the soap opera-like drama within the team's interpersonal relationships has also been known to cause problems. The mutants may be united on Krakoa now but another divide seems inevitable and the latest issue of Hellions suggests that the titular team may play a key part in it.
In Hellions #4, to defeat Madelyne Prior, who had been reborn in her villainous identity as the Goblyn Queen, John Greycrow shot and killed her. Alex Summers, a.k.a. Havok, who had fallen in love with Madelyne during the X-Men's Outback era and been bewitched by her to betray the team during the Inferno crossover, was devastated by this. With a violent release of his energy powers, Havok destroyed Mr. Sinister's old cloning facility where the Hellions had been battling Madelyne and clones of the original Marauders. However, as has been noted throughout Hellions, something is warping both Havok's mind and, consequently, his ability to control his powers. As described in a data page, he apparently remembers Madelyne being shot but not that it was his teammate Greycrow who shot her.
Regardless, Havok was enraged by the Quiet Council's decision not to resurrect Madelyne, due to her being a clone of Jean Grey. He angrily echoed Madelyne's sentiment that "She was a real person," to his brother, and Madelyne's ex-husband, Cyclops. Once again, the methods by which the Krakoan leaders resurrect people, and decide who will and won't be resurrected create controversy and discord among their mutant citizens.
The choice not to resurrect Madelyne seems especially arbitrary given that Sophie and Esme of the Stepford Cuckoos, who are clones of Emma Frost, were resurrected. It's the latest example of the X-Men's habit of abandoning and ignoring Madelyne. Motivated by this, it seems like Havok could very well become a dissenting voice against the new mutant nation.
The most notable example of a divide among the X-Men was the Schism storyline, which saw Wolverine rebel against Cyclops' leadership of the then endangered mutant species. Wolverine did not agree with Cyclops' decision to send young mutant students into combat situations. This led to an era of stories in which half of the mutants sided with Wolverine and formed the Jean Grey School for Higher Learning while the others remained with Cyclops. That divide existed in some form until Cyclops died during events related to the Inhumans and even at times led X-Men from various sides to come to blows, notably in the Avengers vs. X-Men event.
It seems like the questions tied to the Resurrection Protocols could be leading to another Schism that may also involve debate over the welcome Krakoa has given to unrepentant villains. At the end of Hellions #4, Nanny threatens Mr. Sinister, a Quiet Council member and nominal leader of the Hellions, after seeing how vilely he treats and disposes of his Marauder clones. The corruption of Krakoa is becoming more and more apparent and it now seems like only a matter of time before some of its citizens do something about it. Could this lead the mutant race to civil war with the Hellions right at the center of it?