X-Men: The Hidden Years #20

X-Men: The Hidden Years was launched by Marvel Comics in 1999 as a passion project for writer and artist John Byrne. The series was designed to fill the long narrative gap between the original X-Men run that ended in 1970 and the 'All-New, All-Different' relaunch in 1975. Byrne, having previously defined the modern X-Men aesthetic in the late 1970s, sought to revisit these characters with a retro sensibility, effectively acting as a long-form love letter to the Stan Lee and Jack Kirby era.

Issue number 20, published in 2001, serves as part of the series' final narrative arcs before its cancellation. Byrne handled both writing and penciling duties, maintaining a consistent stylistic approach that mimicked the sequential storytelling methods of the Silver Age. While the series was generally praised by long-term fans for its technical execution and nostalgia, it struggled to find a broader audience in the rapidly shifting comic market of the early 2000s, leading to its conclusion after twenty-two issues.