Universe X: Cap

Set in the dreamlike, alternate-future landscape of the Earth X universe, this 2001 Marvel one-shot reimagines Captain America's final, haunted days. Written by Alex Ross and Jim Krueger, with art by Thomas Yeates, it explores a world where the legacy of the Star-Spangled Avenger is tested by age and a fractured society. A poignant, standalone character study, it matters as a key piece of the acclaimed "X" trilogy's meditation on heroism and mortality.