Nope, not yet sure. I hope I hear more soon because other projects are piling up rapidly. I've got a writing instruction book coming out in Sept., a Steampunk coffee table book next year, and a few anthologies.
But the one you guys might be interested in is called Finch and it's a noir thriller with a fantasy setting, coming out in November. It's got some of the same kinds of thrills and chills as my Predator novel.
If I did an Aliens novel I'd have to start writing it by early 2010 probably.