Seinfeld Returns in Comedians in Cars Getting Coffee Super Bowl Special

Curb Your Enthusiasm did a sort-of Seinfeld reunion showcasing a fictionalized special a few years back.
The episode of the Larry David show-within-a-show went as far to play whole scenes featuring Jerry Seinfeld, Julia Louis-Dreyfus, Jason Alexander and Michael Richards back in character. Wayne Knight, Estelle Harris and Kenny Bania even showed up to play themselves doing block and table reads. They never confirmed this. But Pete and I always maintained being the sticklers for details they are, they legitimately wrote and shot the entire TV special and have it sitting in the Castle Rock vaults.
Since it didn't air in its entirety (assuming there was an entire show), that doesn't technically count as the real deal reunion for the legendary 90s sitcom. This episode of Jerry Seinfeld's Comedians in Cars Getting Coffee web-series, on the other hand, does.