The HBO network, now part of AT&T Inc.\u2019s media-and-telecom empire, is often touted as one of Netflix Inc.\u2019s biggest foes. Both companies are vying for TV subscribers, and they\u2019re frequent rivals in award competitions, including the Emmys. HBO plans to boost its programming budget in a bid to lure more viewers. But according to Netflix, HBO is less of a threat than a video game: Fortnite. \u201cWe compete with (and lose to) Fortnite more than HBO,\u201d Netflix said in a letter to shareholders Thursday. \u201cThere are thousands of competitors in this highly fragmented market vying to entertain consumers.\u201d AT&T plans to make HBO an anchor for a set of new streaming services, Chief Executive Officer Randall Stephenson has said. A trio of platforms is due to arrive later this year, with different prices and features. The question then is whether HBO will be as easy to downplay.