Amadee J. Van Beuren produced three Felix the Cat cartoons in 1936, of which "Neptune Nonsense" was the second. The others were The Goose That Laid the Golden Egg (1936) and Bold King Cole (1936). A fourth was planned, to be entitled "Ski Outing" (production number C-28), to be directed by Tom Palmer, and introducing a character named Waldo. Animation model sheets from March 20 and 27, 1936 show Waldo as a rooster and as a cat. It was never produced.