I really feel like we are missing out on a huge amount of the story behind gremlins. All we really have is Herex, who was part of the Nine, and Warmaster Seerus, who I believe is one of the Nine. I think that making missions/expansions around the Nine would be an amazing chunk of content for the game.
My proposal is that we have King Tinkinzar as a part in a new series of missions, and have the other members of the Nine is in their own respective expansion missions. Since the expansion tab seems to be based around the Nine, it would make sense to add the other members. I'm not creative, and I have no clue who the other members of the Nine are or what they wear and such, so I do not know what would be a good weapon/armor reward from each of them.
This would be an amazing tool at giving us a story line behind who the Nine really are, what each of them do, and how they perhaps got to Cradle in general.
Anyways, just a basic opinion from me. I think this would be amazing to see in the game, and a great way to add new weapons/armor/life into the game.
Add ideas on who each member of the Nine would be and what would be some good rewards from them!