I dunno. I'm kind of bugged by Supes and Wondy. I hope it's just a kiss.
I don't really need that whole "Hey we had sex, remember?" kind of vibe to be in the Superman/Wonderwoman relationship dynamic. Sure it works for Bruce because he's not normal, he's legit fucked up. Superman doesn't fuck his teammates. He's above all of that. Part of why he's Superman.
I'm not articulating it properly, but I think it somehow diminishes him, where with Batman it's like, yeah he kind of sort of needs that, to show that side of himself, it's so novel. Superman is already all about the passion, and it's not about some contrived affair with ersatz Superwoman.
Then again, they've rebooted this old morass, and more specifically his old ass, so many times, with so many different personalities depending on who's writing the comic, I guess it doesn't really matter. It's just bad storytelling, so this thing better be worth it.