LeBron James, right, and Maverick Carter participate in a Q and A after the premiere of the STARZ original series “Survivor’s Remorse” in Los Angeles. Matt Sayles | AP Los Angeles Lakers star LeBron James’ entertainment business, SpringHill Co., has agreed to a merger of equals with Fulwell 73, the British television, film and music production company behind shows including “The Kardashians” and “Carpool Karaoke.” The deal was spearheaded by