2 - Underground - If we have a ton of caves, cities and other locales underground I'm certain this is where no Loftwing would be allowed. If the underground is as extensive as even 1/4 of top ground Hyrule is that's a ton of area to explore that keeps the Glider and other traversal tools relevant that outright flight wouldn't completely omit.
I’m a little concerned about possibly exploring caves and the underground because areas like Thyphlo Ruins that were completely blacked out without a torch were among my least favorite parts of the game.
3 - Dungeons - Epona don't get to go in dungeons neither does Loftwing. Same pricipal as the underground.
I expect larger dungeons than the shrines though I think exploration is still going to be bulk of the game.
4 - Sky - If the Loftwing is limited to the "heavenly" part of the sky maybe there are certain natural or unnatural barriers that keep you from just flying to any portion right off the bat.
Part of me thinks the floating landmasses is how Nintendo plans on changing the surface as in they lift up from Hyrule which not only alters huge areas of the surface but opens up underground caves.
5 - Hyrule Surface - Depending on how much has changed I wonder how much the development team wants us to climb the same land masses like we once did?
I was a little concerned about this, but it’s hard for me not to trust that Nintendo will do something fun and interesting here. Aside from what I mentioned above, there is a possibility Nintendo simply extends the map beyond Hyrule from Breath of the Wild into neighboring kingdoms, empires etc.. You can clearly see islands in the distance. The desert simply stops and you can’t travel farther despite visible terrain. The entire top of the map has an entire inaccessible landmass. Mount Agaat is the only area on the Breath of the Wild map that is labeled but can’t be visited by normal means.
Anyway, I’m curious about the story. The Tears of the Kingdom logo looks Zonai-ish and very little was revealed about them. The Seven Heroines (actually, eight) were similarly mysterious. Also, I’ve wondered what would happen if the goddesses returned to Hyrule. “We f-ing gave you these triangles for peace and prosperity, and it’s just been eons of y’all breaking ****. You split the timeline three ways. We didn’t know that was even possible. How did you do that? Why?! **** you guys. We’re taking the Triforce with us.”