Animaniacs (non-existent "Minerva Mink" animated shorts; early 1990s)
The entire Animaniacs cast, including Minerva Mink (top).
Status: Non-existent/Unproduced
The Warner Bros. animated series/variety show Animaniacs was rumored to have had a number of Minerva Mink shorts aside from the two released ("Meet Minerva" and "Moon Over Minerva") that never saw the light of day.
Background
The rumor of unaired was assumed due to the excessively risqué content of the Minerva Mink shorts that were released, and that only two were ever made. Not only that but both "Meet Minerva" and "Moon Over Minerva" have been edited post-production by broadcasters, Teletoon Retro being one of them.
On airing "Meet Minerva" on their channel, the title card was different, but it was the same short as "Moon Over Minerva". Notably, her cleavage was clumsily erased in close-up scenes.
Creator confirms there are no unaired shorts
The creator of Animaniacs, Tom Ruegger, participated in an "Ask Me Anything" topic on Reddit on the 18th April 2016.
An user asked about the existence of any unaired Minerva Mink shorts. Tom replied as follows, confirming that there are no unaired Minerva Mink shorts in existence [1]:-
This confirms that there are no unaired Minerva Mink shorts in existence.