FX has added another No.1 box-office opener to its collection of film acquisitions. The cable network has closed a deal for the TV rights to X-Men: First Class, which opened at the top spot last weekend with $55.1 million. Last week, FX picked up Hangover II, which was the box-office champ the previous weekend. The acquisition of First Class, produced by sister studio Twentieth Century Fox, completes FX’s X-Men collection. The network also has the first 3 films in the franchise. On the strength of their rebroadcasts last week as well as a Two and a Half Men Memorial Day marathon, FX finished last week at No.3 basic cable network among adults 18-49. X-Men is joined by other superhero movie franchises whose rights FX owns, including Spiderman, Fantastic Four and the X-Men offshoot Wolverine. Through its output deal with Marvel, FX is getting Thor and the upcoming Captain America this year. Here is a list of other No.1-opening movies this year that FX has bought: Disney’s Tron: Legacy, Sony’s The Green Hornet, Screen Gems’ The Roommate, Sony’s Just Go With It, Paramount’s animated Rango, Sony’s Battle: Los Angeles and Marvel’s Thor.