While I doubt this to be the case, what if Trey & Matt had planned to reveal Cartman's dad this past Wednesday then found out that they could get their "dream guest star" John Elway to make an appearance, but due to scheduling there was no way it could be done before April 1st? Just a thought..
Have Fun, Shawn "As God as my witness, I thought turkeys could fly!" - Arthur Carlson, WKRP