We know that Tears of the Kingdom is a direct sequel to Breath of the Wild, but the details on what that entails at this time are sparse.

For starters, we know that Link will receive all new abilities to help him navigate the land — oh, and that you’ll be hopping between islands that are floating in the sky.

We know there will be a new threat attempting to attack Hyrule, though since players put Calamity Gannon away in BOTW, what this new threat will be is unclear.

Source: https://www.distractify.com/p/legend-of-zelda-tears-of-kingdom-spoilers