The Premier League is implied to introduce a new rule that will ban any of its clubs from trying to join a breaking league after the Super League saga.Manchester United, Manchester City, Chelsea, Liverpool, Tottenham and Arsenal have all pledged to join the Super League on Sunday night, before pressure from both fans and the media forced all six clubs to withdraw.Before the six teams announced their decision to leave the competition, a whole host of threats were made by football's governing bodies regarding players and clubs…