I just feel it is a MASSIVE misread by Zaslav. He's screwing around with DC fans.... the same guys who bullied a major studio (with help from the director and a lot of twitter bots) into finishing the Snyder Cut. Why intentionally piss them off? It's putting short term money over your long term customers.
Which "DC fans" are you referring to? Any production meeting its end (or never going before cameras) on HBOMax are not exactly swelling with support from those who want to see DC properties adapted. Most are niche productions, much like the CW series, and when they go, there's no massive outcry (as in the cancellation of Supergirl, Batwoman and Legends).
Warner Brother's DCEU is dead to me. Forget about future movies. I'll just enjoy those like the Snyder films, "Wonder Woman", "Aquaman" and "Birds of Prey" and mourn the franchise's now obvious destruction.
I believe the theoretical intent (beyond primary financial concerns) is to finally streamline DC adapted content, and not have 50 different visions (many of low quality / misguided approaches) out there muddying the waters. This is where the planned theatrical films likely come into play, as they are a line of continuity with one framing voice, and if ever they feel the need to dip into a "multiverse" (e.g. the Flash movie), it will happen in that aforementioned streamlined manner, with no one ever questioning why Character-B from some syndicated series is not appearing with Big Screen Character-A, etc. Every film franchise does not need 800,000 universe and characters running around in order to function.