After filming the Reebok-sponsored lacrosse movie “Crooked Arrows’’ in Massachusetts in 2011, “Superman’’ actor Brandon Routh is starting 2012 by taking the film to the experts. He’ll join “Crooked Arrows’’ producers J. Todd Harris and Mitchell Peck at the US Lacrosse National Convention in Philadelphia on Friday to premiere the trailer of the film, which is about a Native American lacrosse team that goes up against a fancy prep school. Aren’t going to the convention this weekend? You should be able to see the first trailer online Friday night at www.facebook.com/USLacrosse. “Crooked Arrows’’ filmed its big game scene at St. John’s Prep in Danvers.