The biggest piece of evidence we have of this is a photo shared by Twitter user and Fortnite leaker, HYPEX, pointing to several Marvel locations and characters possibly making their way to Fortnite, such as Galactus, the Rainbow Bridge (Bifrost), and the God of Thunder himself, Thor.
The Hightower event information that surfaced online may also point at these leaks being true. A strange symbol can be seen on the ground, with many fans pointing out it resembles the mark the Bifrost leaves whenever it's transporting people across the universe.
The "Hightower" event will leave markings on the map that look like this: pic.twitter.com/xUvOyKBRBN— FireMonkey • Fortnite Intel 🎄 (@iFireMonkey) August 5, 2020
Lastly, the recently announced Relaxed Fit Jonesy outfit currently available boasts an uncanny resemblance to Thor's look in Marvel's Avengers: Endgame. Perhaps a hint at the inevitable crossover that's bound to happen?
Taking on the world one Durr Burger combo at a time.— Fortnite (@FortniteGame) August 7, 2020
Grab the Relaxed Fit Jonesy Outfit in the Item Shop now! pic.twitter.com/umJhalCBF4
For more on Fortnite, check out how a hacker decided to expose the game's anti-cheat system live on stream.