A mechanical Ikon seems more likely... Although it's also extremely unlikely.
Maybe Cosina will do another digital M, but it would be a bigger challenge for them than it was for Fuji to do the X100. Fuji already had sensor fab plants, digitally-oriented factories in operation, years of experience with digital camera design and production, along with the money to make it all happen. In short, Fuji had the capital.
Some people would understand the appeal of a $2500-3500 (just guessing) digital M camera, but enough people? Who knows. I think many people in that market aren't as hardcore as the average RFF member, and wouldn't mind the autofocus of the Fuji X series. It's a much more competitive market for a high-end mirrorless camera today than it was when the RD-1 came out.