“Superman Returns” star Brandon Routh is set to topline “Crooked Arrows,” an underdog sports pic set in the world of lacrosse.Steve Rash (“Can’t Buy Me Love”) is directing from a script by Todd Baird. Story follows a rag-tag Native American high school lacrosse team that is forced to join the local prep school league, which is comprised of better trained and equipped rivals. Routh will play the tribal chairman’s part-Native American entrepreneurial son who is tasked with coaching the reservation’s motley lacrosse team in the hopes that he’ll reconnect with his fellow tribe members. An unlikely and uplifting journey to the prep league’s championship game ensues. J. Todd Harris and Mitchell Peck are producing, while Sports Studio (“Miracle”) will co-produce with a focus on authentic athletic casting, outfitting and choreography. Reebok is the film’s first athletic corporate sponsor. Production is scheduled to start this July in the Boston area. Over Memorial Day weekend, Routh attended the NCAA Lacrosse Final Four in Baltimore, where “Crooked Arrows” held an open casting call. “I was moved by the script,” said Routh, whose ancestors hail from the Kickapoo Tribe. “While it has all the ingredients of a classic underdog sports movie, it actually appealed to me on a deeper level. I think the father-son and brother-sister dynamics of the story are compelling, as is [the] more spiritual Native American aspect.” “We couldn’t be happier,” boasted Harris. “Brandon is a highly recognizable and well-liked actor around the world, and he brings authenticity to the athletic and Native aspects of the film.” Routh recently wrapped the indie “Missing William,” which co-stars his wife, Courtney Ford. Thesp last starred in “Dylan Dog: Dead of Night,” an adaptation of the Italian horror comic book. Routh is repped by UTA and Main Title Entertainment.