Start with an psychologist returning to his native Haiti, a mysterious land full of voodoo and the unexplained. Have the psychologist drawn into this world by the death of his brother, giving him voodoo abilities. The watch him struggle with his new powers against the dark forces. Very "X-Files" meets "Buffy" - good start for a series.
Now waste all that potential by giving your lead character a crappy name like "Brother Voodoo".