BotW 2: Smaller world, bigger and more dungeons (I haven't played any dungeons yet, so this is based on reviews). Better variety of enemies, but most importantly: 2 main modes. Open world, like BotW (dozens of weapons, cooking, multiple horses to hold, etc), and classic, like most 3D Zeldas (only 2 or 3 weapons, somehow not open world, hearts drop again, only one horse, etc).
I dont know if that would even be possible, but it would be pretty cool.
I would like another Top-down view Zelda though. ALBW is still my favorite game of all time.