Can't say I'm overly excited.
For me, two of the greatest things about Alien were the alien itself (and the way it was shot), and the whole mystery surrounding the space jockey and all those damn eggs. Both were so "other worldly"...apart from the final man-in-suit shot. I'm finding that the more things are explained, the less interesting they have become.
After Aliens, the law of diminishing returns most definitely applies. Cameron delivered the perfect sequel, and I wish it had ended there. Nothing since has been anywhere near as good, IMHO of course.