Announced April 11: https://deadline.com/2022/04/the-batman-premiere-date-hbo-max-1234999900/
Domestic, the movie had a 41% drop after that weekend, which was no different to its previous drops. Had a 60% drop on its 8th weekend (where it made 1.4 mil) but at that point, it would've made a 6-7 mil difference (even if it dropped just 30% that post-HBO Max weekend, it would've made a mere $2 mil that weekend). You think the movie would've lost another 40-60 mil + internationally?