Considering the LEGO product development cycle, I'd say the 2027 sets should begin life this year, so, hopefully, as we speak the Technic team is deciding what to make and the basic concepts of how. Personally I'm not sure about which Technic set would be the most iconic to recreate with modern elements and techniques; perhaps one from 1977?
Well, I think the 8860 combined model was neat, but my gut tells me it started as a model Milan Reindl did on his initiative and private time, and then he showed it to his higher-ups, who said "sure, why not, we can make it an official model or whatever". Likely, if it were up to TLG alone, all we'd get would be the printed 3L beam in that year's sets, but, to be honest, 40 years isn't as "milestone" as 50 years, and I don't recall getting anything for the 10th, 20th or 30th anniversaries anyway, so I'm not disappointed with what we got for the 40th.