So with the Legion launch we can see brand new cinematic
In this cinematic we see thatYsera's soul is taken by Elune (to become a few new stars?)
Elune is shown as Moon which powers are showing from behind this moon.
And one more thing:
In quest description Khadgar claims that Elune created Xe'ra wich is the "prime naaru"
So lets the discusion start
Is Elune a titan hidden within Moon which refuse to "hatch" and have powers to create Naaru?