Hrm. I don't doubt it's a possibility, I just can't get over what an odd artistic choice it is to slaughter more than half the cast - and such an effective cast - in such a short space of time. This isn't a huge ensemble show like Lost which can just absorb that - they're looking at substantially changing the landscape of the show. Well, they've already done that, and now they're going to do it even more.

Personally I won't believe it until I see it, and we must also remember that death in SF sometimes doesn't last as long as real death.