The X-Men's Havok is turning into a monster. The younger brother of Cyclops, Havok has never been the most stable of mutants. In fact, on several occasions he's been brainwashed and turned into a villain - even leading one incarnation of the Brotherhood of Evil Mutants.
Back in 2014, Havok was one of the mutants affected by the "AXIS" event. A magical spell backfired, inverting everyone in its immediate area; heroes became villains, and vice versa. It didn't take long for the X-Men and the Avengers to wind up in outright war. But, in the end, the inversion was undone - for most people. Havok was one of the few whose mind was not put right, and - although he seemed to recover with the passage of time - he's been troubled ever since.
Newsarama has published an exclusive preview for Marvel's Hellions #1, in which the X-Men realize Havok isn't well at all. He's participating in a mission to deal with anti-mutant zealots on the anniversary of a mutant slaughter; their attack seems to trigger some sort of schizoid disorder, and Havok begins to brutally torture one of them. Here's the full preview:
It's difficult to say exactly what's going on with Havok. For one thing, his current status is uncertain; is this the same Havok seen in the Matthew Rosenberg run, or has he been resurrected using the X-Men's Cerebro technology and cloning? The Rosenberg run ended with Havok expending his powers in an unusual way, exhausting them and literally dissolving; it was unclear whether he'd died, or simply converted into an energy state. The X-Men may well have assumed he was dead, and thus resurrected Havok, with Xavier perhaps unintentionally picking up both Havok's normal mind and the inverted, "AXIS" one. Such a copying error would explain the apparent onset of some sort of dissociative identity disorder.
One thing's for certain; the imminent return of Madelyne Pryor, aka the Goblin Queen, is sure to make matters worse. She's returning as the main villain of the Hellions book, and she has a dark history with Havok; during the "Inferno" event she transformed him into her Goblin Prince. No doubt she will have a strong appeal to the inverted, "AXIS" persona, perhaps meaning Havok will wind up betraying the X-Men. Supporting this theory, the cover of Hellions #4 deliberately evokes memories of the classic Uncanny X-Men #270, in which a branwashed Havok led an attack on the X-Mansion. The future looks very bleak indeed for Cyclops' younger brother.
Source: Newsarama