Not that I'm against it or something, but it seems weird.
How did Warner come up with this idea? She hasn't been around since Smallville. If she actually appeared on Arrow, I don't remember it at all.
"Hey, what if we make a Zatanna film?"
"Oh, what a great suggestion. Let's go!"
Is that how the meeting went?
Why didn't they think of adapting Green Arrow first? He's long overdue for getting a film.
And for the more special effects bombastic adventure, there's the Hawk couple.
These are the DC characters that would normally be first in line for the next adaptions. If we look at it with logical eyes. But not at Warner. Things work different there.
And Warner, you do know your studio bought the rights to Mandrake the magician years ago, right?
Maybe they wanted to adapt him instead, but since female lead comic books have become the new thing, they went with a "female Mandrake".
Their outfit is partly similar, and she's somewhat more known to GA than Mandrake.