Target will have an exclusive digital bonus feature for those buying The Force Awakens Blu-Ray from them, and there’s a short clip previewing it now.
The clip deals with the big lightsaber duel at the end of the movie, and shows off the modified “Force FX” style lightsabers they used on the set. This was something that MakingStarWars.net revealed about the production (and people didn’t believe it back then), so it’s cool to see those sabers in use. They made the physical light sabers for lighting purposes so they would reflect the right amount of light on the actors.
Again, this special feature will be digital only. The Target Blu-Ray will include a special code that unlocks this bonus feature for viewing on Disney Movies Anywhere.