Vectorman has 5 cancelled projects in total
We should've had a CGI stop-motion movie in 1996.
We were supposed to have a Vectorman 3: Ultra in 1997 on Saturn. Didn't come out because SEGA and BlueSky split at the time, abandoning the game mid-production. You can still see the sketches.
Vectorman Neo should've been on Dreamcast, but there is barely anything known about it, because there is no screenshot, prototype or poster leaked online.
Pseudo Interactive was developing Vectorman's PS2 remake, even showed at the E3 2003 event, with the supposed release date of 2004 that never came.
Vectorman 3.14 was another prototyoe version of PS2, but WAY more cartoonish 3-D aesthetic. Also shown at E3 2003, also planned to release in 2004.
Vectorman was one of my favorite SEGA games ever!