Yes, sure, AT&T has no say.... They're just a phone company... That's why Stankey - an AT&T exec for over 35 years - landed on Warner Media's head. That's why almost all of WB execs were demoted/fired over the last 18 months.
Why would AT&T want Scoob for HBO Max? They already set Warner Max for new content for their streaming service. You're saying it like I implied AT&T wants Warner Bros. to shut down because of the Snyder Cut.
Of course, AT&T wants Warner Bros. to function, because they want their content, but the Snyder Cut has nothing to do with Warner Bros. anymore. It's collecting dust in the vault. And if there's demand - and high probebility of making money of it - and Warner Bros. isn't planning to release it because of studio politics, you can be damn sure AT&T will ask "Do you not want to make money for us?".
"AT&T and WarnerMedia don't have authority though", lol. They'll sntach the Snyder Cut like taking a lollypop from a kid. It's theirs.