Personally I think you don't have Hyrule Castle in the land itself and instead have it be the location you are voyaging towards in the boat ride, perhaps with Ganon waiting inside. The castle is iconic but to make the land stand out from Cinderella, Hogwarts, Peach's Castle, etc., I think you could emphasize landmarks like the Master Sword Pedestal, Great Deku Tree, Sheikah Shrines/Towers, Hylian Stables, etc. The show-building having a big mural to extend the sightlines like Kong does could integrate larger locations like Hyrule Castle and Death Mountain by having them loom in the distance and make this relatively small 7-acre land feel larger than it is.