Superman is often called upon to save the world from evildoers, but in his latest big-screen incarnation, he's also being asked to swoop in and save a franchise.

James Gunn's "Superman," which opened in theaters worldwide this week, is a reboot aimed at relaunching the so-called DC Universe of comic book-based superhero movies, which also features Wonder Woman and Batman.

The celluloid efforts of Warner Bros. and DC Studios have been widely eclipsed by Disney's Marvel Cinematic Universe -- the world of Iron Man, Thor, Black Panther and the Fantastic Four, who are getting their own reboot later this month.

"Warner Bros. has invested a lot of energy and money in trying to refocus and renew DC Studios, and this is going to be the big release from that," analyst David A. Gross from Franchise Entertainment Research told AFP.

The heavy task falls on the shoulders of Gunn, the writer-director who won praise from fans of the genre with Marvel's "Guardians of the Galaxy" trilogy.

The movie's rollout has already encountered several headwinds, including a right-wing backlash to Gunn's comments on Superman's role as an immigrant, and skepticism from fans of........

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