Im about 100% sure that this did not hint Suzanne's departure in season 5... but in season 4, there are 2 things that writers mightve kinda did specifically about Suzanne.. [kinda hard to explain]

i know this isnt true... but its just kinda weird

In "The Reverend Steps Out" .. she says "I just hope Ms Piggy doesnt become all stuck up now that shes a big movie star"..
[doesnt that kinda sound like something the producers and writers would think about Suzanne]

And in "The Root of All Evil", they are fighting about money... before they know it, a few months later, it becomes a real issue.