For several reasons i'm interested in the Snyder Cut ; the aesthetic of the movie was butchered with the Joss version, the music, the scenarios, the actors also were not rewarded for their performances.
But most important is that this version should be useful for the DCEU, and that's where it's complicated.
I don't think a release on HBO Max would be useful, WB would need to go all in with this version and plan a re-release in theater with a big event. Chances that it will occur ? 0% but they would need to invest and polish the movie and make sure that it connects with the futur movies. Use it to launch the next batman, a new Superman futur, plan it as a new release for end of next year where there is nothing.
But is the Zack version really anchored in the vision of the futur of the DCEU ? We know it's not.
So even if they would release it on HBO Max, the message would be really strange and offsetted with the new direction.
But for sure, i'd love to see it, and i'm sure I would love it. MoS and BvS UC, are masterpieces for me. But if i'm a high WB executive planning for a real long term, why would I release something that would remind everyone the old plans, the old actors I want to replace.
I'm sure there are a lot of actors yesterday that tweeted their support because they want to see the "final" product, but more importantly just because it was the 2 year anniversary.