What are they?

Well, one project that came to my mind was the Robert Jhonson story, the blues singer that made a pack with the devil, this story was reported on tv guide on 1989 (in part of the Prince cinemax rock special where they show he's 3 films PR, UTCM and SOTT), he was suposed to play the lead role, but never happened.
Another unreleased project was the Mj bad video, he was asked to play the villain, course he denied.
And another unrealeased project was the mtv unpluged special, back on the early 90's he told spin magazine he had a dream about playing "walk dont walk" on mtv unpluged "and i will"- he said - never happened.
and what happen to the kevin smith doc?

there's also a project that was called THE HARD LIFE. it featured music from Madhouse, and Cat, Wally Brooks, and Prince's father acted in it amongst others.

guess Prince didn't really like it, because in the credits it said: "mis-directed by Prince"

don't know but according to kevin smith, he has at least 50 never to be released music videos in the can.

aaronsap said:

i really hoped that this was going to happen, because it sounded good. i am waiting for Prince to act a decent role. i think he really would have been good, kinda like Bjork in that tearjerker DANCER IN THE DARK or like Bette Middler in THE ROSE.