With the Sheikah Slate abilities being back, the game will have a Sheikah based theme yet again. And we have Skyward Sword influences with the sky world and all. Honestly, this is pretty damn good.
They paid attention to Skyward Sword, improved on it even. I always felt that they should take more elements from SS. Now I kind of hope they bring back combat mechanics of Twilight Princess too.
Pretty sure Impa will appear again too, albeit old. But, I think the game MIGHT have some time traveling mechanics, as that would make a lot of sense in forever eliminating the Calamity, and truly bring back the Hyrule where Link and Zelda lived , 100 years prior BotW. This is pure speculation however... But it's fun to do.
The game looks amazing. I kind of hope they will make a prequel to Skyward Sword using this game as a base. That would be completely badass.