Tony Stewart and Ray Evernham announced a plan to revive the IROC as a six-race, short-track spectacular in 2021

 Evernham said to expect announcements about scheduling, TV partners and tracks, likely in December. “We are waiting until NASCAR and IndyCar release their schedules,” he said, so they’ll know if and when drivers are available to race in the new series.

https://www.thedrive.com/accelerator/37496/update-the-new-iroc-series-is-still-on-for-2021