That would be cool. With attractions that use movie screens (eg. Star Tours, Soarin', O Canada, etc.) - there is always an opportunity to use new movies without changing the physical aspects of each attraction. All that would need changing is the computer technology that tells the attraction to respond (eg. motion simulator, seats / smells in Soarin', etc.).
A Soarin' movie could highlight any place on Earth - it would make sense to show places that would not only be visually appealling, but could allow Disney to use their smellitzers and other add-ons.
Another thought that crossed my mind - Epcot has a world showcase - why not use Soarin' to showcase places that aren't represented in the world showcase? There are so many fascinating places that not a lot of people will have the opportunity to visit. It may only be a 2 minute 'ride,' but it can be a great showcase! Think of the merchandising opportunities - the attraction could be sponsored by the featured country's Ministry of Tourism. DVDs (and other merchandise provided by the Ministry of Tourism) could also be sold at Soarin'.
May the Force be With You. . .