Well, it looks like we got ourselves some Marvel cosmetics! The first released was the Black Widow Outfit, and it is a pretty awesome skin with some great accessories to go with it. We also got a pretty fun LTM that allows you to play with some of the Avenger's powers, or hunt down the Infinity Stone as Thanos and his minions. If that isn't enough for you, Epic announced that there will be a second set of Marvel cosmetics on the way!
Pop by the store and you’ll be able to buy the first of two Marvel sets: the Black Widow Outfit plus Widow’s Pack, Widow’s Bite Pickaxe and Widow’s Pirouette Emote! The second Outfit set arrives early next week…;)
Now, they leave it up to our guess what that outfit set might be, but according to leaks it looks like it's going to be Star-Lord from the Guardians of the Galaxy franchise! The name of the set (Guardians of the Galaxy), as well as some of the items included with it have been found in the files (Credit to FortTory).
According to some more file strings, it looks like there will be a "Guardian Axe" (Pickaxe), "Star-Lord Pack" (Back Bling), and "Dance Off" (Emote). The Emote is likely a reference to Star-Lord doing his Dance-Off in the first Guardians of the Galaxy movie:
Update: The skin has been officially released, along with a few more items to go with the Guardians of the Galaxy set.