With anywhere between 65% and 70% of movie theaters now open in North America, Warner Bros. debuted the highly-anticipated Tenet to rather underwhelming results. Tenet, the latest from writer-director Christopher Nolan, debuted with $20.2 million at the domestic box office, according to Variety. The thriller opened in several international markets before its domestic debut, as it nears $150 million worldwide. Box office: With anywhere between 65% and 70% of movie theaters now open in North America, Warner Bros. debuted the highly-anticipated Tenet to rather underwhelming results Tenet was initially slated to open in theaters back in July, but it was pushed into August and then this weekend over the Labor Day holiday. The film, which stars John David Washington and Robert Pattinson, earned $20.2 million from 2,810 theaters, earning a solid $7,188 per-screen average. However, since several major theatrical markets are still closed, such as New York, Los Angeles and San Francisco, that l