1.-Well, First of course is the one that all are we missing, because we didint get enough of him in previous expansions.
https://youtu.be/TYOPuqH4L68?t=51
Credits to Flamy507 for the video
2.- And second but not less important, we need our lord and savior:
What do you guys thinks about the second one tough? I think he could have a minor role with Kael, that is also returning