The leak is obtainable through glitch. Watch below:
The New Hero is a VIKING!!!!!!!
https://m.youtube.com/watch?v=1N36fC4CEnc
It most likely isn't the new hero. I fell for it as well.
Like Raime said coding of a "Prince of Persia" event was found. I know this bc someone in FH Trials posted a picture of the code.
Also when comparing the "new hero" to the protagonist of PoP, you can definitely see the ressemblance (Google Prince of Persia: Sands of time and you'll know exactly what I mean).