NBCUniversal Chief Executive Steve Burke will step down from his position in 2020 and NBCU executive Jeff Shell is expected to replace him, according to media reports Friday. Burke will remain at his job until August, after the NBC television network broadcasts the Summer Olympics, Variety reported. He has run the Universal City film, television and entertainment company since 2011. NBCU is a unit of Comcast Corp., based in Philadelphia. Both Variety and the Los Angeles Times reported that Shell, who currently serves as chairman of the NBCUniversal Film and Entertainment division, would become chief executive and split his time between operations in the Valley and New York. NBCU plans to launch its advertising-supported streaming service Peacock in April.