Ultimate X-Men [Free Comic Book Day Edition]

For Free Comic Book Day 2003, Marvel offered a standalone glimpse into the Ultimate Universe's mutant corner, written by Mark Millar with art by Adam Kubert. This single issue served as a concise, accessible entry point for new readers into the reimagined world of the X-Men, showcasing the high-stakes, cinematic style that defined the early Ultimate line. It matters as a snapshot of Marvel's ambitious effort to modernize its core franchise for a 21st-century audience.