The xeno on the covers gives me some small hope that we'll get at least a sub-plot dealing with David and Shaw, but I'll try not to expect it too much.
I'm actually really into the idea of a book set on Earth. The world-building was one of my favorite parts about Rage War, so it should be cool to see what ADF does. The movie and the novel seemed to really be pushing the idea of humanity needing to go beyond Earth, so imagine things will be rather dire.