Great video, god I'm excited for this now.
I love the Affinity logos and the soft, neutral tones that go with them. I kind of wish the Supremacy logo was a little neater than it is but no matter.
One of the things I'm kind of interested in now is the quest system; I think I was more initially wowed by the ideologies than anything else. I remember in Civ IV BtS there were random events and sometimes quests. Some of them were kind of flat: "a hurricane has destroyed your mine", while others lent themselves more to the imagination. The specific memory I have of that system really influencing a game was one where I was tasked with building 8 triremes. Had the quest not come along I probably would have built none. Instead I worked for it and achieved the 8 triremes and got a naval combat bonus. What was more important than the bonus was that it changed the fiction of my game...I was no longer just playing a random civilization, I was playing a civ that made sacrifices to become a naval powerhouse.
I hope the quests in this game feed that same imaginative impulse to create a narrative around your game. My concern is that because there is an actual body of fiction surrounding the world rather than fact, the quests would be too much like a linear drip feed of information.