Sonic Boom (non-existent lost episode of animated TV series; 2014)
Sonic Boom is an Animated TV show, produced by the companys Sega of America, Inc. and Technicolor Animation Productions. First premering in November of 2014, it has spanned over 100 episodes in two seasons. There is, however, rumours of footage from a lost episode of this franchise.
The person who originally stated this has since deleted his original thread on 4chan, but stated the episode was a pilot shown to Sega of America, Inc. , and was scrapped due to it not being "suitable for a first episode". It was never realeased to the public, but some have theorized that remenants of this lost episode lie in the "Meet Sticks" video.
In this video, there are several storyboard sketches that never saw a realease on TV or any other form of Sonic media than this trailer. It is suprising that the sketches have never been realesed or even been addressed by the artists, yet it remains a mystery.