That's the strategy.
Superman 2025, US theatrical release Jul 11. Streaming release Aug 15.
In contrast, "Man of Steel" took 5 whole months from US theatrical release (June) to streaming (Nov).
Even "Thunderbolts" took 2 months (May 2 - July 1) before streaming.
Man of Steel came out in 2013. It had a normal theatrical window. So that makes sense it was there for 5 months.
I guess digital sales blew up in 2013. Increased revenue by 50% that year from digital sales for studios. From what I found, Man of Steel was the 9th best-selling movie on digital after it's theatrical run. But look at what else came out that year, Iron Man 3, Despicable Me 2, Hunger Games Catching Fire, Gravity, Monsters University, Fast and Furious 6, Star Trek into Darkness, World War Z, The Croods, Thor: Darkworld, The Wolverine and Argo. Just to name a few. Argo was the #1 selling Digital movie followed by World War Z and Star Trek Into Darkness.