The sequel to Return of the Jedi will be released in December of 2015, titled Star Wars: The Force Awakens.
What makes this different from the previous three Star Wars prequels? George Lucas had almost nothing to do with the making of the film. Yes, no more Ewoks or Jar Jar Binks, or any other poor attempts at young children product placements that ultimately killed each prequel and Return of the Jedi.
Yes, Star Wars and The Empire Strikes Back are in my opinion the best of the bunch. Great special effects, storyline, and action. Only to stumble with Return of the Jedi and the three prequels being prevented from being timeless classics.
The first trailer was produced for American audiences, the second trailer was made for the rest of the world.
What to look for? Storm Troopers have a slightly redesigned appearance, the light saber now has two ‘light handle bars’, a Darth Sith “may” have survived from Return of the Jedi, and a few more minor tweaks to let you figure out.