An on-line interview with Rugter Hauer can be found on the Rutger Hauer Official Web Site
Among the questions are a one about the possibility of an sequel to Blade Runner..
Question: Has there been any talk about the “Blade Runner” sequel?
Rutger: There has been talk and hype and of course willingness enough. A lot has to do with the legal rights to use the name. I’m sure there are scripts floating around. But it’s difficult. “Blade Runner” is such a brilliant piece. I don’t think there will be a #2.