If I hear the same theory too many times, I get sick of it and find myself hoping it's not going to turn out to be true, and "Ben is the next to be eaten" has reached that point with me, so I find myself hoping for him still being in the cave 25 years later! Having said that, since Ben did tell Natalie of its existence, might she end up leading the others there at the start of S3?

I would have probably added Travis to the plane scene at the end myself had I written it.