Some beliefs I've seen about aliens do often tend toward new creation myths, but I doubt I have any particular insight into them. I do find it odd that some who are so dismissive of traditional religious beliefs are so credulous in this area
Well, for someone who embraces science and cares little for the traditional moral constraints and accountability that go with it, a religion like Raelism would fit perfectly. What Rael did was claim that the Elohim of the Bible were actually technologically-advanced extraterrestrials that created mankind. In other words, Rael claims that God does not exist - period. He teaches his followers that cloning is the method by which we achieve eternity. He embraces a geniocracy - a world ruled by intellectual elites. He also advocates sex in just about every way, shape, and form. Now, can you see how this might appeal to someone who poo poos traditional religious beliefs?
