Share January 11, 2021, 7:22 PM Prepare to hear more about a Pontiac auto track called M1 Concourse, even if you re not a race fan. It s the site of a substitute for the 2021 North American International Auto Show, which was set for Detroit this Sept. 28-Oct. 9. Its pandemic-related cancellation for a second year is announced Monday. Instead of the manufacturers two-day media preview, two-day walk-through for engineers and other industry insiders, black-tie gala and eight-day public event at TCF Center, organizers will host Motor Bella from Sept. 21-26 at the 87-acre automotive event space that opened in 2018 on South Boulevard between Telegraph and Franklin roads in the Oakland suburb.