No, this isn’t some drug-induced hallucination or twisted cross-media promotional campaign (although it is certainly good marketing for the American shoe brand). Epic Games launched a cosmetic item called Kicks in Fortnite this November. The new feature allows players to customize their character and choose which shoes they wear. This is why Zuko can reasonably (and completely legally) wear Nike sneakers in a battle royale game now.
Fortnite launched Kicks with a limited selection of shoes that will be released in two drops. Drop one contains four different pairs of shoes with varying prices. The basic white leather Nike trainers cost 800 V-bucks, whereas the fancy galaxy-patterned high tops cost 1,000 V-bucks. (Personally, I think the Chomp Stompers shark slippers look the cutest, and they’re less expensive at 600 V-bucks.)
Kicks are pretty pricey as far as in-game items go. Players can get 1,000 V-bucks for for $8.99, and they have already criticized the pricing for being too expensive. On top of that, Kicks are only compatible with a limited list of Fortnite characters. For example, you can customize the footwear for Satoru Gojo and John Wick, but not Avatar Aang. That all being said, there are just enough character and shoe combinations to allow people to put together some pretty goofy looks.