After a quiet January that saw one horror sequel and the same holiday releases putter out over several weeks, the domestic box office finally has a new leader. Paramount Pictures’ “Jackass Forever” is projected to earn $20.7 million in its opening, stunting on the weekend’s other wide release, “Moonfall.” “Jackass Forever” earned $9.6 million on Friday across 3,604 locations. The document-of-bodily-harm-cum-heartwarming-reunion is landing near the top of its box office estimates, which projected the movie to take in around $15 million to $20 million in its opening weekend. “Jackass Forever” sees the return of stuntmen Johnny Knoxville, Steve-O, Wee Man...