According to an insider source, WWE has made a wording change to their talent contracts following CM Punk and Alberto Del Rio’s departure from the company and their subsequent move to other promotions.

The new contracts read that if the talent is fired for disciplinary reasons, they will forfeit all merchandise rights and will be unable to work in either pro wrestling or MMA for one year.

It's unlikely that the new contracts would stand up to any legal challenges in court but it would be a costly move for any individual wishing to bring their case to court.