Given that it seems like a vaccine is coming in the spring, i think it would make more sense to plan for a summer release (but what do i know). Question is whether the theaters can hang in there until then without going bankrupt. But with 150,000 new cases a day doesn't seem like a lot of people will be rushing to go to theaters in late December, assuming governors don't shut down theaters entirely.
I mean yeah as a fan it would be great to see it on HBO Max in January, but from WB's standpoint would probably make more sense to delay.