No Kroger; No Marmalad
I also thought it was odd that Kroger (Tom Hulce), who went on to become editor of National Lampoon, was not included in the reunion. In fact, he's not mentioned in any bonus materials on the Double Secret Probation DVD. Either he refused to participate or Landis refused to invite him.
No Marmalad (James Daughton) either. It would have been funny to see what became of him after he got of prison.