This set would be based on the final scene of Return of the Jedi. It would contain minifigures of Anakin Skywalker, Yoda, and Obi Wan Kenobi as Jedi spirits. It would make a great display model and add to the wonderful collection of Star Wars characters available by Lego. A spirit Obi Wan especially would be nice as he shows up on Hoth and Dagobah besides Endor.
As per a comment I've decided it would be better if they were glow in the dark. My son just got a few of the Monster Fighter sets they have a lot of glow in the dark pieces. If the pieces were an opaquish blue color that glowed a light blue I think that would be awesome. Also the capes would look nice with the Harry Potter Invisibilty cloak material in a light blue color.
Let me know what you think and if you would like to see this on your desk or shelf give me some support.