X-Men: Battle of the Atom

In 2014, Marvel published a single-issue comic that served as the capstone to the sprawling "Battle of the Atom" storyline, which had unfolded across the various X-Men titles of the era. Illustrated by the legendary Arthur Adams, this oversized special brought together multiple generations of X-Men—from the original five time-displaced teens to the modern team—for a climactic confrontation against a mysterious future Brotherhood. While brief, the issue is a key moment in the X-Men's time-travel saga, celebrated for Adams's dense, dynamic artwork that crams dozens of fan-favorite mutants into a single explosive battle. It stands as a vivid snapshot of Marvel's mutant line during a period of creative upheaval and legacy-focused storytelling.