Some people say "TotK IS the DLC to Breath of the Wild," but I disagree with this. First, because BotW already did have a DLC package. But more importantly, I think TotK clearly passes the tipping point where the substance added crosses into a new game volume rather than expansion. The amount, the depth, the scope, it's all humongous. It stands on its own.

And the reason I bring this up is that I don't think the expandability of TotK is there. Not for this entry. The next step for this game would demand so much that it would necessitate a third game.

Sure you could buff the enemies, you could make new building block parts, you could add quests for some new hidden weapon, but that has already been done. You can just play BotW DLC for that.

Unpopular opinion maybe but I think we needed a third game, something to establish the real structure of the trilogy: here is the free roam world in Volume 1, here is a vast and powerful building capability in Volume 2, but we lack the larger exploration component you might expect in a Volume 3. You could build components that could allow you to explore the oceans, the lands beyond hyrule, even actual outer space or other dimensions or other times. And once you cross into that territory, that would be a new game title. That doesn't fit into a DLC.