The attraction will go to different locations (this has been talked about on the Disney Parks Blog I believe). It is going to be a random attraction, meaning that you will not ride the same ride twice (at least in a row). There will be 3 different parts and the computer will change each flight to go to different locations. There will be easter eggs (think of how your game system can change with the holiday seasons at times) and some lucky guest will be picked out as a Rebel spy by Load Vader during some of the flights.
Also this attraction now takes place between Ep. 3 and Ep. 4, so as we have seen in some of the art that has come out you will see things such as the work on the first Death Star and Alderaan will be fine. Plus you will see Courscant post Jedi but during the rise of the Emperor. Also you will have to be on the look out for a few Wookiees during some of the flights! Also you will want to be on the look out for one of the fastest ship that has ever done the Kessel Run jettisoning its cargo! And YES you will take part in a Pod Race as seen in the teasers put out by the Parks blog, but it will not be the only thing you do!