I would be shocked if they do. New Digitakts are still selling at a premium, and ones on the used market are still priced close to new. The Digitakt/Digitone pair seem to still have a lot of product lifecycle in them, so from my admittedly outside viewpoint, I don’t see a lot of reason for them to do a DTMKII in the near future.
If anyone has any insider info to the contrary, I’d be happy to be wrong. Wait. no, I wouldn’t be happy, I’d probably want to spend money.