The incident with Alberto Del Rio happened at the Smackdown taping this week. There are 2 sides to every story but apparently Del Rio slapped one of their employees. I'm told that the employee did work on the internet side and did some work with their social media. It's no coincidence that Del Rio's firing is posted as the lead story on WWE.com. WWE usually likes to bury company releases but they are fuming over the incident and the word is that he's burned a bridge with them. Del Rio has expressed frustration with how he's been used and there was talk that he was going to let his WWE deal expire so he could go back to Mexico. There's also been talk of him doing work with AAA and their expansion into the United States.
More info as it becomes available.