It’s a snowy January day in Southeastern Pennsylvania, and Blizzard Entertainment executive Pete Emminger is standing in front of a 5,000-square-foot stage that, over the next six months, will travel to 11 different markets across North America and Europe, including London, Paris and New York, for the inaugural season of the Call of Duty League.Around Emminger, some 170 people are moving risers, setting up LED boards and conducting tests.