Fortnite has just released patch v12.40 and a number of new cosmetics have been found in the game files. As usual, while we don't know exactly when these will be released, we should expect to see them over the coming weeks in the Item Shop or Battle Pass challenges.
A number of new cosmetics have been added to the Marvel Series, including Domino and Cable. We'll likely continue to see different outfits added over time.
Here's a look at what to expect (via @Lucas7yoshi, thank you!):