Out of the two, Zelda is going to get the smaller land, should it happen. Just not anywhere near as popular as Pokemon.
I'm not convinced there's room for two rides, especially if they go with the ride system
@Alicia highlighter, which looks like it would need a big building. My guess would be a Zelda-fied LC would, line up wise, look a lot like the current LC. One big attraction, a show, some dining/shopping, and I'd guess a play area.