A new UK-based sports powerhouse is stirring, as the country’s competition regulator has greenlighted the merger between Eurosport UK – a property of Warner Bros. Discovery – with BT Sport – British Telecom’s soccer-centric TV business. The 50:50 joint venture brings a distinctly American flavor to the lucrative UK sports content scene, pitting a merged BT/Eurosport – which will soon be wed under a single brand name – against Comcast-owned Sky Sports. As Faultline correctly predicted, buddying up with a US media giant has been preferred to an outright sale of BT Sport to disruptive streaming service DAZN, which had its bid to acquire BT Sport rejected earlier this year. Had BT approved the offer, then we see little reason…