Yeah I thought of the alien angle before too but I really hoped it wasn't going to go there. It has nothing to do with plausibility, I just don't like aliens. To be honest I can't think of a good reason why I feel that way, but I've hated the majority of series I've read that involved aliens so anytime aliens or extraterrestrials are mentioned I get uneasy.

They can call them monsters, or demons or even beings from a different dimension and it wouldn't bother me at all but mention aliens and its usually an automatic turnoff. And the way things are progressing it really doesn't look too promising.