in our local newspaper I`ve read that besides the new terminal that is being built at the moment they also want to extend the runway (3345m) to the east.
Another option is to built a new runway which seems to be unlikely to me. In the article it says, there was enough space to extend the runway between highway A8 and the airport. I don`t think the extension will be too long because if you land on Rwy 25 or drive by on the highway, you can see clearly that there isn`t a lot of space left. Does anybody (maybe 737-700 or other guys in the STR area) have some information on that?