A boat ride could work if it’s through the underground dungeon beneath Hyrule castle where they find the Ganondorf mummy and it could take you ‘outside’ into Hyrule field for a battle at the end or something.
I think the reason they’re going in this direction is to give IOA an indoor mega E-Ticket that anyone can ride. IOA is short on family attractions to begin with, and when it rains, nearly every attraction besides Cat in the Hat can be vomit-inducing to certain people, so I can certainly see why they’re doing this.