Source: PWInsider
Alberto Del Rio did media in Mexico today and noted that he cannot wrestle in the United States for one year. He also admitted there was a backstage incident with him and a WWE employee but did not go into details.
Del Rio not being able to wrestle in the US for one year could be a sign that he was found to be in breach of his WWE contract. When WWE talents are found in breach of their deal, they are informed that they will no longer be paid additional revenue due to them past the day of that breach. Also, talents found in breach cannot compete in wrestling or MMA for one year.