Ridley Scott confirmed that the 'Blade Runner 2' script was finished and even made a joking reference to Harrison Ford's recent Star Wars Episode VII on set injury, saying, "It's written, and it's damn good. Of course it involves Harrison, who is a survivor after all these years -- despite the accident. So yes, that will happen."
When asked when the movie would get made, Scott said "Probably after [The Martian.]", "That’s the problem. I’ve got a lot of ducks in a row. But they’re all written."
Harrison Ford has not yet confirmed his involvement in the movie, but the fact that the script is written and that Rick Deckard returns must mean Scott is pretty confident he will come back for the sequel.
Source: insidemovies
Special thanks to Djrees56 for the news.