The Wonder Woman writer is ignoring the rest of the DCU. That title is about mythology and Gods and stuff. So the speculation about Superman and her book holds zero in terms of sales. He has not been mentioned or seen in her books. Neither has any of her iconic and classic characters and rogues, including Steve Trevor and her mom and sisters have been shelved for now.
Most people if they like the sm/ww ship will be buying JL becasue that is where the relationship is right now. The SM writers intend to bring WW into the SM books. So if you know that, some fans might buy that, otherwise why buy WW if 1, the mythology and god chasing ain't your thing and 2, Supes is not going to be in it?
And the OP who started this? Do you expect to know stuff like that on a first date? I must be stupid or something since this Superman is not the boyscout of last continuity and Diana has a different origin too etc so to me this is two new versions and DC are starting fresh. Not one of us know anything that will happen or how it will happen because it has not been written and yet to be read. So far Johns have been showing they are very attracted to each other and feel this connection and they are now opening up to each other.