Forbidden Eye said:
By saying "changing that formula" you somwhat imply that an adventure/action story can't work with an old man in the center of it. I don't agree. Ever heard of Don Quixote?
The formula for Indiana Jones was that he ran, jumped, whipped, swung, slid, fell, rolled, got punched, got whipped, got dragged, and any number of other ridiculous things.
He was as resilient as Batman, only more inept.
But he doesn't have as many gadgets. So when he gets old the formula fails.
However, landing in the fridge shattered any internal logic. Maybe now he's no longer a human, but a Superman?
Sure, Indy can be Superman at any age, but it isn't classic Indy.
If he isn't Superman he's an ageing master in need of a proxy. To be true to the formula it'll be Mutt or a reboot.
Forbidden Eye said:
John Wayne was still staring making movies until his very end. Clint Eastwood also still stars in movies.
They generally just shot people without having to run, jump, or be dragged.
Indy typically does a lot more.