Short Films : The Process

The Process

It will happen one day. Someone is bound to write a movie about a guy who grew up in West Virginia and eventually became the most successful coach in college football history. He's on the verge of that now so it's plausible to consider how history will portray him on screen.
So, if the movie were made today. Who would portray Nick Saban? What if it were made about twenty years from now? What 30-40 year olds could play Saban as he is now, while also wearing makeup to go younger/older for certain scenes.
Also what is the arc? Or has it not even happened yet?
Just got to thinking about this in light of certain events.
Any thoughts?