Star Trek/X-Men: Second Contact #1

Following the events of the film Star Trek: First Contact, the Enterprise, while returning to the 24th century, is diverted to the 20th century of a parallel universe by a powerful time traveler called Kang the Conqueror. There, they encounter the super-powered mutants named the X-Men, and assist them in fighting Kang's plan to remake the timelines of every known universe. If these two groups of heroes fail – history itself will change forever!