LeBron James' SpringHill Co. is merging with Fulwell 73. The British production company is known for shows like The Kardashians and Carpool Karaoke. SpringHill is known for sports-focused productions like Netflix's Starting 5 and Hustle. It will gain greater scale for major media and streaming deals through the merger. Investors like Nike and Epic Games back the deal, which includes $40 million in new funding for growth initiatives.