Some more scans from the Summerset Online guide.
You battle several different Josajeh's from different time breaches (this fight takes place in the White-Gold throne room). Ritemaster Josajeh noticably has the ability to control time.
Gryphons are the apex predators of Summerset, and have fierce strength, being strong enough to create vortexes in the air.
Clan Direnni left Summerset long ago for an island in the Illiac Bay.
The College of Sapiarchs don't let just anyone teleport to their college.
There are books and scrolls on Evergloam lore in Evergloam, and you are encouraged to go look for them.
Coral Crabs cover their shells in coral and anemones, and their powerful claws can crush thick carapaces and pry open even the most obstinate bivalves. Most of them (with a few exceptions) are peaceful unless provoked. They can shoot bursts of water, heal each other and create shockwaves.
The Evergloam is a realm of permanent twilight and gloam ruled by the Night Mistress. It would be considered peaceful and sombre if not for the hordes of creatures of night and shadow.
Someone or something is opening breaches in time, which you must seal.
Giant Salamanders are found naturally and only in Summerset, and can shift between three elements (fire, ice and lightning), which will allow it to use attacks of said element and become resistant to said element. They can slow their metabolisms to create a shield around their bodies.
Mephala is the Prince of Spiders.
The introduction, which details the backstory of Summerset's history and how the Altmer (and indeed all mer) originally came from Aldmeris long ago.
The Psijics have the power to control time itself.
Indeed, the Mock Turtles shell can be found in ESO, and most scholars don't believe there's a Mock Turtle below the Weir Gate. They can't deny though the shell is really big.
