Suzanna Love is credited for starring in the film, but she doesn't actually appear in any of the original footage, her scenes are just flashbacks taken from Spectre (1980).
Not a sequel to Boogeyman II. This could explain why it was called Return Of The Boogeyman instead of being Boogeyman III. The movie supposedly ignores Boogeyman II.
Footage from Ulli Lommels Brainwaves is used. The bathroom electrocution is from that movie and is neither a flashback from The Boogeyman or new footage.
Like Boogeyman II this sequel uses flashbacks to the original, but this movie is 90% flashbacks unlike Boogeyman II which was only half flashbacks.