Marvel has reversed its decision to renew the Disney+ series “Wonder Man” for a second season, surprising its star Yahya Abdul-Mateen II. The Emmy-winning actor, who played reluctant superhero Simon Williams, addressed the cancellation on Instagram. He wrote that he was “glad we got to be a part of something cool” and added “that’s life, right?” and “everything will shake out.” The show had been renewed for a second season before the studio unexpectedly pulled the plug. Abdul-Mateen referenced the news on Instagram, saying, “Word just dropped that Wonder Man won’t be coming back for Season 2.” The cancellation marks a rare about-face for Marvel Studios, which had announced the renewal. Abdul-Mateen, known for roles in “Watchmen” and “Aquaman,” had been set to reprise his role. No reason for the reversal has been given. The series had been in development for several years before its launch on Disney+.