Well, look at the latest trailer for "Suicide Squad", many people responded well to its more humorous tone. I think the difference between Snyder's, Ayer's and Jenkins' style will be apparent and people who didn't like MOS and BvS will want to see a DCEU film that's not directed by Zack Snyder. Again, marketing hasn't started yet. We'll see what they'll do, but just making a point that they don't feel like Snyder directed those films will do the job, I believe.
And I like to think that beside MCU's quippy, lighthearted fun and X-Men Universe's more serious, but mostly straightforward stories, there is also a place in the world of CBMs for DCEU's darker themed, somewhat thought-provoking style.
I'd hate it if the reaction to BvS would result in narrowing the possibilities of what can be done with a comic book film.