It sounds like Nintendo is ready to move on from Tears of the Kingdom and focus on something new, and it could be a sequel or an entirely different series.
How to get the Fuse ability, find the In-Isa Shrine and complete The Ability to Combine shrine puzzle on the Great Sky Island in Zelda: Tears of the Kingdom.
How to reach the Gutanbac Shrine, get the Ascend ability and complete The Ability to Rise shrine puzzle on the Great Sky Island in Zelda: Tears of the Kingdom.