This is the cobbled together list as per JTA: (I removed most of the annoying editorial comments)
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the first six will be released as commemorative Blu-ray steelbooks for a limited time on November 10, with pre-orders beginning on August 7. Each film comes with beautiful new character packaging that include Darth Maul for The Phantom Menace, Yoda for Attack of the Clones, General Grievous for Revenge of the Sith, Darth Vader for A New Hope, an Imperial stormtrooper for The Empire Strikes Back, and Emperor Palpatine for Return of the Jedi. Star Wars: The Complete Saga will also be released in newly-repackaged artwork on October 13.
In addition to the collectible steelbook packaging, each Blu-ray disc features existing audio commentary with George Lucas and the film crew as well as audio commentary from archival interviews with the cast and crew.
The Complete Saga includes all six feature films on Blu-ray, along with three additional discs containing more than 40 hours of previously-released extensive special features.
So it's going to be like the X-Box 360 with backwards compatibility. A few games at first as a test (glad to see Mass Effect in there) and they will add games over time. Eventually, pretty much every game will be playable.
• Stormtroopers have same armor as they do in the original films (i.e. episodes IV - VI)
• Lots of alien life forms, Mon Calamari among them
• New droids and aliens will be introduced. Kind of a no-brainer, but just so you know it's not just a bunch of rebels
• At-Ats, X-Wings, Y-wings, At-Sts are said to be present.
• Implied that some of the film will take place on Yavin-4; a lot of armies in the jungle and various battlefield locations
• Looks like a new droid will be part of the band of rebels attempting to steal the Death Star plans
• Felicity Jones is seen dressed as a rebel soldier ready for battle; expect her to get her hands dirty in this one
Given the December release of the film, I think we're probably looking at a TFA line reveal either at SDCC or a later special event. And based on past history, I think we could be looking at an October release. And that's still 5 months away. All in all, we seem to be in thoroughly uncharted territory.