What if the next Austin/Rock is already in WWE, but it's someone nobody is predicting?

Everyone always says Bron Breakker, Oba Femi, Jacob Fatu, Trick Williams etc.

But imagine the actual generational guy is somebody we're barely talking about right now.

Austin wasn't exactly being presented as the future biggest wrestler in the world when he was The Ringmaster.

Who's your real dark-horse pick from NXT or the main roster?