The archetype of this story is really the Tarzan series if you go back to basics.

And, as I said earlier, if you see the extended cut fully, you see that the wimpy business man rejected his military assistant's plans and was imprisoned for his "change". His final words in that movie to the commander were "you are SO fired!".

BTW, there are about 30 books in the Tarzan series and about 30 books in the OZ series. Tarzan continues to be brought back in films, but OZ has not. Wonder why? Is it the generic Avatar type story line? Hmmmm.