Anything is possible, but I strongly doubt this would happen. As is evident from this thread, some people need transportation for medical reasons. DCL has no way to differentiate people who “need” golf carts from those who “want” golf carts. (A initial attempt to define those who needed carts as those in accessible staterooms was apparently quickly abandoned.) Making people who need carts in order to reach the island pay extra for them would be a really bad look.Does anyone else think that Disney just might, might, in the future, monetize golf cart rides to and from? Possibly limited amounts of them?
I could see Disney providing additional transportation such as bicycles or Segway-like scooters at a cost, since those would clearly be an option for people who want them rather than a necessity for people who need them.