The NBA is considering splitting its 30 teams into groups that will play at regional sites for the 2020-21 season amid the COVID-19 pandemic, per ESPN's Adrian Wojnarowski:
"This time, ideas center on regional sites and windows of participation that would extend a month for teams, sources said. After that, teams would go home and train—perhaps for two weeks—and move onto the next regional bubble against a new pod of teams. Orlando is a consideration, and Las Vegas—a finalist for this summer's restart—would reemerge as a possible site too, sources said."
A Dec. 1 start date has been tossed around to launch the 2020-21 regular season, but the league is open to beginning in early 2021 if that buys the league more time to host games at home arenas with fans.
That, of course, is dependent on a number of COVID-19 related factors.