I'd be shocked if Zelda got an expansion but not a ride. That's not something a modern, Comcast-run Universal would do IMO. I'm thinking that Mario Kart and Zelda would be the large scale e-tickets, Donkey Kong would be more on the scale of 7DMT at around a d-ticket, and Yoshi would be a simple c-ticket omnimover. Not that the ticket system is relevant anymore, but it's how I imagine the grandness/scale of each ride to be.
If this land is expanded, I still REALLY hope we get some smaller attractions, shows, playgrounds, etc. Donkey Kong playground, Yoshi flat ride, and a Zelda live show would be perfect compliments to the lands and could make SNW one of the biggest, most well-rounded theme park lands in history.