Korean TV contents would help AT&T grow
Frankly, HBO contents are deemed(at least from my view) rather out-dated and not much appealing to viewers. HBO should buy or build the partnership with those players who own and produce Korean dramas and singers(who can be the next BTS). And here are the three players whose contents HBO might be able to buy at cheap price and make good profits.
MBC, one of the major broadcasting companies in Korea, that can provide HBO a thick list of dramas at least ten or twenty that might catch a lot of K-drama fans around the world.
KBS, SBS, similar companies like MBC.
Keep in mind that the demand for K-dramas is gradually growing around the world, especially in Asia, middle east, south american countries.