My dealer here in the flagship store here in Berlin said that new models will perhaps be introduced in September 2021, which would make them 2022 models. They seem to be selling EURO4 models as 2021 models in the US and Australia, but these are unchanged from the 2020 models. I was afraid they would scrap the 6 cylinder entirely forever due to EURO5, but I have been assured that that is not the case.
The crew at BMW were not able to finish the design and testing of a new EURO 5 conformable motor in time for the 2021 season, most likely due to the pandemic. They will revamp the entire K1600 line-up for 2022, since this has remained almost the same since its introduction in 2011.
Some guesses: it will most likely have a very large TFT screen with navigation and maps and some radar features, wireless charging compartment just like on the new 2021 RT. I think they will also scrap the Xenon lighting and go for a full-LED headlamps. Maybe they can scrap off a few kilograms of weight to bring it sub-300kg.