WARNING: This article contains spoilers for Astonishing X-Men #9, by Charles Soule and Matteo Buffagni, in stores now.
In the pages of Astonishing X-Men, Rogue, Psylocke, Mystique and the rest of their team of mutants has been going from one crisis to the next. What started as a psychic attack on London morphed into a battle with the Shadow King and reality itself in the Astral Plane. Now, an old villain from the X-Men's past has returned to torment the world.
Charles Xavier may have been freed from the Shadow King's grasp, returning to life inside the body of Fantomex, but his return cracked the door open for Proteus to slip through as well. This turn of events sent a shock wave through reality itself, and now it appears as if it was just the first building block to a devastating future known as the Mindkiller Apocalypse. What is this potential event and, more importantly, can it be prevented?
We first heard of the Mindkiller Apocalypse back in Astonishing X-Men #7. In the issue, Charles Xavier, now going by X, had just returned to life, and he had to deal with the rampant psychic infection orchestrated by the Shadow King. All over London, thousands of minds were under his control, and X had to reach into them all in order to purge his enemy out of his subjects. The infection was removed from every single person, resulting in some form of green energy that concentrated over the London cityscape. This mass of energy, as Bishop would point out, ended up looking an awful lot like a green sun in the sky.
Seeing as how Bishop has access to the Endtime Database, he inquired if such an event had any effect on the future. As it turns out, we learned that the green sun over London was one of the igniting events that would lead to the Mindkiller Apocalypse, something that would lead to a sterilized Earth. Soon after, the green energy would detonate, giving way to the arrival of Proteus, himself made up of this same emerald energy.
This immediately led us to theorize that Proteus was the leading force behind this extinction level event. After all, one of his powers is to take control of the minds and bodies of others, making him a shoe-in for the head of something called the Mindkiller Apocalypse.