My Cousin has a friend who's wife is friends with one of the writers of Seinfeld. This writer hangs out with Larry David a lot and apparently Larry spilled the beans of the last episode to her.
Apparently George is going to propose to Elaine except that Elaine eats some bad fish at the restaurant where he is proposing and dies. Kinda like how Susan died from the announcements. But in a strange plot twist, George sees Kramer with both Susan and Elaine and they are alive. "Amazing!" George yells. "I drive them to death, he brings them back!"
Elaine and Susan become good friends. Elaine introduces Susan to David Puddy. They fall in love and get engaged.
Jerry proposes to Deloris but accidently says, "Mulva, will you marry me?" She storms out very angrily.
Kramer sees Mulva crying and consoles her. They sleep together after which Kramer tells Jerry, "I can see why her nickname was clitoris."
Kramer sees Newman walking out of his apartment with an AK-47. "Newman what are you doing?" "I've had it with that damn post office! I can't take it anymore! Now everyone will know who Newman is."
Kramer talks him out of it and they have a very tender moment as they both share there feelings with each other.
Jerry's parents come to visit from Del Boca Vista and happen to run into the Castanzas in Jerry's apartment who are visiting George. They decide that since George and Jerry are friends, they should be friends too.
The episode concludes with everyone in Jerry's apartment: Jerry, George, Elaine, Kramer, Susan, Newman, Puddy, The Castanzas and the Seinfelds. They all are talking about the good old days. As they reminisce, scenes from the best episodes are shown. Finally it ends with everyone posing for the camera and Jerry says, "Thank you America for making us part of your family." They all wave to the camera and say goodbye.
I can't wait to see it. It sounds really good.