I think a person could be a fundamentalist even if intelligent life was found elsewhere in the universe.
They could take the approach that the bible is the record of god's dealings with the intelligent life on earth - humans, and that there is no reason for it to apply to other planets. Such a person might argue that when adam and eve sinned, the earth was in effect quarantined from the rest of god's children...
...of course, since such contact would be made by "imperfect" men, the newly found alien would have to be apostate if it voluntarily contacted the quarantined planet Earth...
so maybe an interalactic war would be justified?
Please understand that this isn't what I believe, I'm just letting myself go into "spielberg mode"...
By the way, if any of you Watchtower writers out there would like to use this as a framework for a new theology, please keep in mind that the idea is copyrighted by me on this day. I could be persuaded to license it, but it will cost you.
"Behold! the brave new Jehovah sock puppet in his futuristic aluminum foil spacesuit!"