Grant Morrison and Frank Quitely becoming the creative team of the newly retitled New X-Men was a very successful effort to revitalize the X-Men brand. After a few years of being relatively forgettable, Morrison and Quitely made changes to the team that still play a major part in the comics more than ten years later, and created elements that would be incorporated into the up-and-down film franchise.
E is for Extinction is the first story arch of their sizable tenure. It introduces the concept of secondary evolution, which has X-Men mainstay Beast changing from his old self into a more feline body, while telepath Emma Frost develops the secondary ability to change her whole body into nearly impenetrable diamond (a trait that is also shown in her minor appearance in X-Men Origins: Wolverine and her supporting role in X-Men First Class). Perhaps a more obvious change for the crew is that with this shift in creative teams the group has also shifted from individualized outfits to more basic and matching suits that emphasize that they are indeed a team of superheroes and don’t operate as individuals.
The story of E is for Extinction is outstanding; a new villain called Cassandra Nova is hellbent on destroying mutants to make way for what she claims will be the next phase of evolution. Although she doesn’t have the same level of charisma as Magneto or the pure cool factor of Apocalypse, she is a strong villain on the basis of the fact that she is so powerful that it is pretty terrifying. By the end of the three issues worth that comprise the storyline (and three-quarters of the trade release), she has managed to rack up a body count in the millions.
Morrison and Quitely have worked together a lot since this run, but E is for Extinction really made the X-Men cool again. The spirit of this book is so important because it modernized the X-Men in a way that was later carried on into Joss Whedon’s Astonishing X-Men and is still an important part of what the X-Men are. With all of this in mind, it is really essential reading for anyone with an interest in the X-Men in print.