Age of Imprisonment was the new announcement that got me the most excited by two miles and a superglued flying machine.
I'm wondering if Imprisonment will change the ending again. I suspect not; the previous game already did that, and the Imprisonment War's canon ending wasn't a literally apocalyptic failure. On the other limb, time travel is already part of the story. Oddly, Tears retroactively justified the plot device from Calamity, for all that I doubt that it was on purpose.
I'm pretty sure that part of the reason for the time travel plot in Calamity was to have an excuse to put large-scale battles in what had been a relatively peaceful era prior to Calamity Ganon escaping. Not an issue with this story.
I'm expecting Sonia to be a playable character, regardless of whether or not the game starts after her death. If nothing else, I expect the game to address the issue of her and Rauru's offspring.
So... Pretty sure that the original Sages are the source of the names for the Divine Beasts. Calling it right now, they'll be named variations on Nabooris/Nabooru, Medoh/Medli, Rudania/Daruna, and Rutoh/Rutah.