Before this was seriously greenlit, Jason Bourne was going to head to...
South America. A year or so after "The Bourne Ultimatum", the forth film was going to be set mostly in Brazil (Probably Rio, Brasilia, or Sao Paulo), with Matt Damon, Joan Allen, Julia Stiles, and Paul Greengrass attached. The plan obviously fell through, and we received this instead.
No, I'm not making this up. Unfortunately, the link to this news report is dead (most likely).
http://www.slashfilm.com/jason-bourne-goes-to-south-america/