Vince McMahon was ordered by doctors to stay off the road for a while. Vince has apparently come down with some sort of internal infection. Everyone in the know about this is very tight lipped about it and other sources say most of the wrestlers didnt even know Vince was ordered to go home.
Due to this apparent infection, McMahon could not attend the Great American Bash. However, he was in constant contact with all the agents, wrestlers, writers, etc.
[ Source: Wrestling Observer ]