i sometimes think that some people don't appreciate the implications that will follow from finding life outside of earth. Yes, religion adjusted to Darwin by making evolution the tool of the supreme being. But even after evolution we are left with the implication that we humans on Earth is "special to God" because no life is yet found to exist anywhere else.
When life is discovered elsewhere religion will adjust again, probably further in the stoic "the universe is god" direction. But once we see that we are not the only intelligent life in the universe, it will become less possible than ever for priests to convince people of normal intelligence that we are divine sparks destined for eternal life.
Of course our chosen peoples will no doubt try to convince the "Martians" that they should be accepted as the "light of the world" and hear the same "good news" that we are burdened with on Earth, but I don't think that will get very far. The "Martians" will not likely be as gullible as are most Earthlings.