Are we making this the Chaos-military airbase?
Basically Yes. Mighty force in the world tries to genocide chaos gods. If we find anther Chaos gods, we should invite them to the castle. It's a serious war. We must be ready for it
As for nonchaos allies, they aren't interested in that war, so they shouldn't participate in the fortress
I was rather hoping we could make a huge trade center for gods that having flying creatures.
But no one said that we can't allow our other allies\partners to visit it. Same goes for trade. Also note that I want workshops and some civilian space, not only various weapons
And no, we aren't building an empire, we are building NATO against USSR
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As for the after fortress, I'd suggest to spend some time with all that souls in afterlife (I knew that it was good idea to look for the former god afterlife), improve their living conditions, turn some of them into defenders of the afterlife, and choose one with useful skills to bring back to life in one form or another (giving shared soul to all firejackets is the thing I'd consider)
Oh, and I am unhappy with that mole, it breaks the plant\reptilian\insects theme even more... And 150 mana.... pfff.. Well, at least it should be somewhat useful.
I suggest to use it to build tunnel road to the dwarfs, much safer (and dwarven) way to trade