What if? (religious reaction to extraterrestrial life)

A bear giving birth to a gorilla - assuming it was entirely natural rather than a gorilla embryo being implanted in a bear - would disprove evolutionary theory.It is not just the degree of difference - although that in itself would be a major problem - it is the fact that under current theory it is massively unlikely that the offspring would be a classified as an already existing species.In all we can say that it is effectively impossible under the current theory.