But when EW assembled its list of the 100 Greatest Characters of the Last 20 Years for the cover story now on stands ... about the project's past, present, and future. Read on after the jump ...

Earth-X revolved around an event happening differently and this idea would come to fruition with “Days of Future Past”. Now, I’m not saying that Earth-X is the first time we got an alternate ...

Told in 1981 within the pages of Uncanny X-Men #141 - #142, "Days of Future Past" enriched the X-Men’s mythology with the introduction of new core concepts like time travel and alternate ...