3. The Sixth Sense
There is a lot of potential in a sequel to the 1999 box office smash. You could continue following a grown up Cole Sear (played by Haley Joel Osment in the film) as he becomes a medium of sorts for the unspoken dead. Or you could let Dr. Malcolm Crowe (Willis) float through the afterlife, helping other troubled souls who "See dead people" from the great beyond.