High chance your hopes won't be in vain. The Fortnite skins shown there are fairly consistent, though Synapse is mirrored, with her left ponytail now being on the right.
The DC skins on the other hand have two styles from what I can see. The topmost pic in your post has a differently dressed Harley (mirrored twintails, striped jacket and gloveless hands), which isn't what we see in the other covers and the preview render:
And in the last 3 covers in your post, Batman is apparently wearing a battle-damaged suit, with his right arm exposed.
As for Manabyte suggesting that current Catwoman (using the Rio model) will simply return...note that Black Widow has two variants: one using the Headhunter model (which oddly enough, hasn't returned for over a year since Endgame) and the recent Snow Suit variant using a unique face model.
Wouldn't be surprised if the new variant Catwoman (with a unique face model) comes as a DLC code in the second or third issue.