Ellis continued to write the book into "Stormwatch" volume 2, until the August 1998 "WildC.A.T.s/Aliens" crossover (also written by Ellis) which saw the Stormwatch team decimated by xenomorphs (the creatures from the "Alien" film series). Most of the Stormwatch characters Ellis had not created were killed off in this story while the surviving characters he had created became the main cast of Ellis' new series, "The Authority", including Jenny Sparks, Jack Hawksmoor, Apollo, the Midnighter, and Swift (who debuted in Stormwatch vol. 1 #28, written by Jeff Mariotte) as well as two new characters who were successors of the Engineer and the Doctor from Ellis' "Change or Die" storyline. "Stormwatch" volume 2 ended with a story, set after "WildC.A.T.s/Aliens", in which the United Nations disbanded Stormwatch. The last scene, a conversation between former members of Stormwatch Black, introduced The Authority and promoted its first issue. Other survivors from the original team (including Battalion, Christine Trelane, and Flint) appeared briefly in "The Authority", and King and Trelane became central characters of "The Monarchy".