Judicial documents of Epic's battle with Apple, first suggested that Grande would arrive at Fortnite this October (with Lady Gaga on the Party Royale stage in December), and now the leaker suggests that Epic has completed a testing program intern. These shows would work in line with previous concerts with Travis Scott and Marshmello, who have only managed to be more bombastic over time.
The leak also suggests an imminent crossover of Stranger Things that adds something called “The Sideways,” a realm that, like the show’s upside-down, will spill horrible monsters into the game world. Epic also plans to add a series of Justice League and Suicide Squad characters, and attempts to gain access to Naruto during Season 8 along with an explosive kunai weapon.
The court documents are obviously legitimate, while the leaks come from a source that Fortniteleaks moderators claim has a consistent track record (including The "Primal" season of Fortnite) and is "100%" reliable. There are a few other teases that do not appear in court documents, including map changes, the return of usable mechanisms, and a complete map change for Chapter 3.
As with all leaks, it’s worth taking them with a pinch of salt. But with Grande’s concert and Naruto’s mockery appearing in official documents, this confirmation suggests that the unofficial leak is also accurate.