It looks like Intel's 10nm Alder Lake Desktop CPUs which would be part of the 12th Gen Core family have appeared in a leaked slide which hints at a release around 2021 with a full 7nm product line expected by 2022. The slides which are from Intel's POA roadmap shows new developments taking place in the entirety of 2020 and the years ahead.It's unknown how old these slides are and whether they're still accurate.
Also interesting is the slide that shows the process roadmap.