Matt Damon and filmmaker Paul Greengrass, who had said after The Bourne Ultimatum that they didn't see themselves making another Jason Bourne movie, have rescinded that declaration and are heading full bore into another one...after a couple years.
See, Damon and Greengrass are both committed to other projects for the foreseeable future, but they are going to make the film eventually. Or, so they say. If they didn't, we wouldn't be the least bit surprised. After all, they just told us a few months ago that they wouldn't, didn't they?
E! News Online: New Bourne to Make Four