Yes, what if you run out of series numbers like Core i9 9900K? Move another digit or go back to the drawing board with a new naming? Well, it appears Intel will be doing the first and could be using a 10.000 processor suffix for upcoming processor generations.
So a Core i5-10210U is found in the 3DMark database by Twitter user Apisak. That is a quadcore from the Laptop U-series with a tdp of 15W and a clock speed of 1.6GHz. It is probably a chip based on Comet Lake U that Intel still produces at 14nm. Also, a Core i7-1065G7 is spotted in a Taiwanese forum. Based on that entry, what's in store for desktop procs? Well, It seems something like Core i9 10900K in the future?