European soccer’s Super League is on life support. Six English clubs pulled out of the breakaway competition late on Tuesday, just 48 hours after they joined, prompting key architect and Juventus (JUVE.MI) boss Andrea Agnelli to admit that it could no longer go ahead. Yet the financial appeal of U.S.-style sporting cartel remains irresistible for the owners of teams like Real Madrid and Manchester United (MANU.N). Barring a regulatory crackdown, it’s only a