Would it be legal to make a Fortnite APP?

I have a plan for an app

there's an App in AppStore "Wheel for Fortnite".

Would like to create your own app and use content from Fortnite.

The owner of the app I think sits in the US and makes the fair use right.

If I upload the app to the American App Store, then fair use law would apply to me as well.

Would it be legal under some circumstances to make such an app with commercial purposes?

I also use Fortnite content for YouTube banners or something, so I do not think Epic minds it.
I just would not talk bad about her.
If you only play tips and something in the app then that's certainly ok.
I suppose you do not want to create a mobile game clones from Fortnite.