You could probably compare it to Emerald for Ruby and Sapphire. Its going to have a modified story. Some areas will get cosmetic makeovers while others get functional makeovers. The gyms will be set up different. A few new areas will be added and a Battle Frontier.
Theres also a possibility of Gym Leader and Elite Four changes like the 3rd gen line. In RS, the 8th Gym Leader was Wallace and the Champion was Steven. Then in Emerald it changed with the 8th Gym Leader being Juan (where he came from, who knows.) and the Champion being Wallace while Steven was hidden away in a corner somewhere.
The movie was cool. I'm excited to see theirs now entrance animations for your pokemon and the trainers actually have an animation. Seems nifty =P
My Creations in Modnation Racers! Check zhem!
http://community.modnation.com/en-us/players/IvoYaridovich/creations
