Any plans to implement mixed crews in later versions? Would be cool to see the aliens actually working side-by-side with each other, and it would require the player to adapt his strategies on the fly.
Another cool feature that probably won't happen because the art assets would have to be made for it is to see humans start appearing among the enemies, once at least one nation has surrendered to the aliens. The aliens would probably use them as grunts or cannon fodder, but it would drive home the reality of the invasion quite nicely. Not only are you fighting the aliens, but you are also fighting the traitors, and fighting what your race would become if you lose.