^^^ Completely agree with Bob. I don't want to say never, but I haven't seen it done yet. Unless the CTX takes off like the Gold Wing or CBR series, I half expect they're going to wring everything they can out of this platform (which they're already doing by 'borrowing' the ST's drivetrain), and then either kill it or replace it with something else. With very few exceptions, that's typically Honda's M.O.
UNLESS -- they actually intended to have a longitudinal V-4 with a DCT for this bike but couldn't get it designed, developed and produced in time, and borrowing the ST's drivetrain is just a temporary measure to get it out there sooner. That's always a possibility I guess, but there was still a huge development effort just to get this far. And if they really wanted a DCT in this bike, they could have taken the VFR1200's setup instead.
I'm inclined to say we'll not likely see a DCT on this bike, but who knows for sure.