I’ve been quite out of the loop lately and just saw on Ultan’s Library that the next Gene Wolfe book, A Borrowed Man, has been listed on Amazon with a release date of October 20th, 2015. According to a recent interview with Robert K. Elder of the Chicago Tribune he’s also already started writing the book’s sequel.
The interview gives mention that he’s still open to returning to the Urth Cycle universe. As I finish up my 3rd read of the Books of The New Sun, that’s something I would definitely appreciate seeing. His world building is nothing short of incredible.