Wonderbat is a garbage fire that puts Diana's universe on hold to be Bruce's arm candy until he backslides to Selina and then she's back to having no real love interest of her own. I would rather not relegate Diana to Batman's girlfriend. She needs to build out her own world. Modern Bruce is such a duplicitous bastard and strikes Robin, too, so I don't think Diana would find him appealing in that way. He embodies too much of the ugliness of man to really be the type of person she'd fall in love with. Wonderbat is the nadir of Diana's dating pool.
But hey, they were in the cartoon where nearly every woman threw herself at Bruce so I guess that has to mean something.