Comet Lake is the code-name for a possibly imminent series of upcoming Intel CPUs. Accord to some leaks, they will then be followed by Rocket Lake. A leaker claims to have uncovered a reference to a new ATX motherboard that may pertain to some of these chipsets.
https://www.notebookcheck.net/The-first-evidence-of-boards-for-Rocket-Lake-may-have-arisen-in-a-recent-leak.451327.0.html