In the first Patch 10.2 PTR build, we've datamined an updated Merithra Dragon Aspect model as well as a new visage form for Fyrakk.
As the heir to the Green Dragonflight's legacy, Merithra finally has an updated Dragon Aspect model.
Merithra's New Dragon Aspect Model
For comparison, you can see Ysera's current Dragon Aspect model to see how closely they resemble each other.
Ysera's Dragon Aspect Model
As the final boss of Amirdrassil, the Dreams Hope, Fyrakk has also received a dark fiery model likely related to his consumption of the undying shadowflame magic in 10.1.