I'd like to see Golden Sun properly revived with the kind of budget Nintendo's been throwing at Monolith Soft for Xenoblade. Live instrument music, a big 3D cel-shaded world, 3D puzzle solving with the Psynergy abilities to manipulate the elements, and very good, short, and relatable character interactions/dialogue with great voice acting. Oh, and no cursing/cussing. Golden Sun should feel like Zelda in spirit, nothing like what Fire Emblem's become, or Xenoblade, or a Tales of game.
/dream
Also, I want a new game with Hiroyuki Sawano as composer. Hopefully Smash for Switch will have songs from XenoX.