II." Bendis, who wrote The New Avengers tie-in issues for the original "Civil War" storyline, stated that he only agreed to write the sequel after Mark Millar and Steve McNiven, the creators of the 2006 miniseries, turned it down. The idea of the sequel was conceived at one of Marvel's semi-annual editorial retreats. Axel Alonso, editor-in-chief of Marvel Comics, stated that unlike other major comic book storylines which take years of planning, he only had three to four months to plan "Civil War II". This abbreviated timetable was necessary in order to capitalize on the release of the feature film Captain America: Civil War, which was released in May 2016. According to the official synopsis, a strange new character with the power to accurately predict the outcome of future events comes to the attention of the world. This power divides the heroes on how best to utilize the information, with Captain Marvel advocating the prevention of future crimes before they occur by targeting the would-be perpetrators, and Iron Man believing that "the punishment cannot come before the crime." The situation reaches a turning point when it is predicted that one of the heroes will be the cause of major destruction, forcing the others to make a difficult decision. Bendis said, "People's personal accountability is the theme of this one ... from the way cops are acting on camera, to the way people talk to each other online." The plot for "Civil War II" began to develop in the second volume of The Invincible Iron Man, which is also written by Bendis and drawn by Marquez. In March 2016, Marvel revealed which characters will appear on the opposing factions. They also revealed two spin-off series: Civil War II: Spider-Man from writer Christos Gage and artist Travel Foreman, and Civil War II: X-Men from writer Cullen Bunn and artist Andrea Broccardo. Bunn explained, "This tale is set into motion by the same catalyst that sets 'Civil War II' into motion. A new power emerges among the Inhumans. This power, in Magneto's eyes, could be very dangerous to the mutant population, so—in typical Master of Magnetism fashion—he decides to take it for himself. As you can imagine, something like that could very easily start a war between the Inhumans and the mutants. Storm sees this and decides to stand in Magneto's way." In Civil War II: Amazing Spider-Man, Spider-Man helps a precognitive Inhuman