Teams Secret (left) and Invictus compete against one another in the Dota 2 (Defense of the Ancients) video game tournament to begin at the Warfield Theater in San Francisco, Calif., on Sunday, May 10, 2015. Photo: Amy Osborne, The Chronicle

Someday in the not-too-distant future, friends may huddle around a screen to watch “League of Legends” instead of football on a Sunday afternoon, according to a report released Monday.