User blog comment:ANYStickman/Death Of A Character In Season 26/@comment-71.184.120.204-20140721060953

The options are Sideshow Bob or Rabbit Hyman Krustofski. None of the characters voiced by Hank Azaria are being killed off, he confirmed it. The character that dies is portrayed by an actor who won an Emmy for playing that character. So with those clues we can narrow it down to one of those two.