From the PL website:
'The Premier League is a private company wholly owned by its 20 Member Clubs who make up the League at any one time.
Each individual club is independent, working within the rules of football, as defined by the Premier League, The FA, UEFA and FIFA, as well as being subject to English and European law.
Each of the 20 clubs are a Shareholder in the Premier League. Consultation is at the heart of the Premier League and Shareholder meetings are the ultimate decision-making forum for Premier League policy and are held at regular intervals during the course of the season'.
So, essentially 3 more USA owned teams and they can do whatever the f*ck they like.