This release was originally announced to be in 3D.
Luke, Leia and Darth Vader are not related in this film.
Darth Vader is deliberately played by Lexington Steele to avoid the relation of incest with Princess Leia (played by Allie Haze).
Darth Vader in the official films is voiced by James Earl Jones, who is black, although the character is white. Lex Steele, a black man playing Vader is a nod to this.