By Jack Queen NEW YORK (Reuters) -Actor Jonathan Majors, a rising Hollywood star who had been set to play the leading role in an upcoming Marvel superhero film, was found guilty by a New York jury on Monday on charges he attacked his ex-girlfriend in the back of a car. Shortly after the verdict, a spokesperson for Walt Disney- owned Marvel said the studio had dropped the actor from future projects. Majors portrayed a villain known as Kang the Conqueror in this year’s “Ant-Man” movie and was scheduled to play the lead role in 2026 release “Avengers: The Kang Dynasty.” Majors had been charged wi…