This is quite a gut punch to my business (I've already put in many months of work on all these titles) but we knew more was still coming. Theaters in some countries would be doing fine now but are starved in that they depend on American releases. As an example Korean cinema was already on a roll and now they've had a period with radically less virus than us where their theaters can operate but only with Korean new releases, still theaters there can't hit their regular numbers lacking America's biggest cultural export.
Correct me if I'm wrong, but this news should mostly help those International theaters beings how many International markets still don't have access to HBOMax, which means going to the theater will be the only options in those countries. At least for them as well this mostly ensures there won't just be further delays of Warner releases.