How would you feel if militaries planned for fighting Egyptian gods? Just because I can imagine something doesn't mean it is real and that it needs planning for. Using effort on imaginary risks isn't free.
That's long covered already. Ever heard of the StarGate franchise? That's literally an Air Force approved exercise in fighting Ancient Egyptian gods with modern weapons :).
More seriously though, Egyptian gods are equivalent to aliens in general, and adjacent to AI, and close enough to fighting a nation that somehow made a major tech leap, so militaries absolutely plan for that.
