X-Men: Deadly Genesis
2006Ed Brubaker reveals Xavier's darkest secret: before sending the All-New X-Men to rescue the originals on Krakoa, he sent another team — Vulcan, Darwin, Petra, and Sway — who were killed in the attempt. Xavier erased all memory of their existence. Now Vulcan, the third Summers brother, has returned from apparent death with omega-level power and a burning desire for revenge. A retcon that permanently tarnishes Xavier's legacy and launches the Vulcan saga.
6 core issues, 0 optional tie-ins/crossovers
A mysterious mutant awakens and attacks the X-Men; the secret of Krakoa begins to surface
Flashbacks reveal Xavier's hidden team; the cover-up starts to unravel
Vulcan's identity and his connection to Cyclops and Havok are revealed
The X-Men confront Xavier about his lies; Vulcan's power is staggering
The truth about the original Krakoa mission is fully exposed
Vulcan defeats the X-Men and leaves for Shi'ar space; Xavier is stripped of his role; Cyclops is devastated