Guardians of the Galaxy / All-New X-Men: The Trial of Jean Grey

In this 2015 Marvel crossover, Brian Michael Bendis and Sara Pichelli bring the All-New X-Men and the Guardians of the Galaxy together when Jean Grey faces judgment for her future self's cosmic crimes. The single-issue story pits the young time-displaced X-Men against the Shi'ar Empire, with the Guardians caught in the middle as allies. It's a compact, high-stakes collision of two teams that explores legacy and redemption.