Word on the streets is tomorrow is the day we finally get the 2021 schedule. Chicagoland has already confirmed they will not be on it, Kentucky is rumored to be losing theirs.
https://www.jayski.com/2020/09/29/2021-cup-schedule-expected-wednesday/
There's going to be an announcement about Darlington tomorrow. It's possible they get one of the dates.
It would be so NASCAR if they just shuffled the tracks around and went back to two races at Darlington and Atlanta.
A bit of an update prior to the official release from what I found on Jayski:
1. The Brickyard 400 is out, replaced by the Indy Road Course (mid-August date).
2. Road America will be run on July 4th weekend.
3. Circuit of the Americas will be run the weekend prior to the Coke 600.
4. Atlanta 2nd date in July (because that makes sense to apparently everyone).
5. Darlington 2nd date in May.
Based on this:
IN: Road America, COTA, Indy RC, Bristol (dirt), 2nd Darlington, 2nd Atlanta, Daytona RC (for the Clash), Nashville.
OUT: Indianapolis, Kentucky, Chicagoland, 1st Texas Race (will host All-Star Race), 2nd Dover Race.
My math is off because I have 7 out and 6 in, so someone feel free to correct me.