As things stand, Tenet is still set to hit theaters on July 17th. However, there's a decent chance it will end up being delayed, and if that happens, it will most likely impact the rest of Warner Bros.' 2020 tentpole releases.
According to a new report from Deadline, the studio will require at least 80% of the world's theaters to be open, including those in New York, Los Angeles and San Francisco, for Tenet to make its scheduled July bow. This would allow Christopher Nolan's sci-fi thriller to release in 3,500 domestic theaters and over 30,000 screens worldwide. If that doesn't happen, Tenet will move to Wonder Woman 1984's August 14th spot, pushing Patty Jenkins' DC Comics sequel to an undisclosed date in December.
Though the trade doesn't specify, this would almost certainly be the date currently occupied by Dune (December 18th), which would shift Denis Villeneuve's highly-anticipated adaptation to next year.
Warner Bros. won't be the only studio closely monitoring the theater situation, as Disney will also be forced to reschedule Black Widow and Mulan.
Right now, all we can do is wait and see. We should have a better idea of how things are looking over the next couple of weeks.