Well this Simpsons are killing off a character right? If she was sick for months, maybe her character is the one that was going to die?
It apparently wasn't:
Quote:
The Simpsons, which began in 1989, had recently announced it planned to end the life of a veteran character. Producers previously killed off Ned Flanders’ wife Maude in 2000. But Jean said today that Mrs. Krabappel was not one they had planned to eliminate. “Earlier we had discussed a potential storyline in which a character passed away,” Jean said. “This was not Marcia’s Edna Krabappel. Marcia’s passing is unrelated and again, a terrible loss for all who had the pleasure of knowing her.”
But I wouldn't be surprised if they changed it to Edna now.