I will start it here because i think a great idea maybe get lost in the middle fo a gigantic discussion post.
Hopeprevails suggested introducing lore in the campaign. This idea is simply fantastic. We have good threads made by users about some KCCG lore. We could use it. More than that. We could encourage ppl posting lore here, and rewarding it with its inclusion on campaign. We could get nemesis really involved in the game (a card, or even a future hero).
The campaign should be designed to tell kccg lore, and users could help build it.