Here’s my theory
The three founders of the Rev army represent Joy Boy:
Dragon -> will of D.
Kuma -> Bucaneer
Iva -> outcast/weirdo
All the 3 of them are tied to concept of freedom
Joy Boy was probably a Bucaneer with a D. in his name (he has a giant Strawhat) and a weirdo/outcast
He believed in Nika or created the concept of Nika
This is the crime of the Bucaneer's
They also have a special ability which is not explainable through science