Its sure that the novel is not the movie galmorzu, they would never do this right. They dont want to spoil the entire thing. When i was reading the novel, and that they were talkin of the alpha grid and all, and then when we saw the thing in the clip, that was suppos to be grid, and as we all saw it is not different from a normal alien. So im sure that the end is gonna be different from what we have read . And cookies, the thing is that PA said that he wanted to do this one on earth cuz when he saw the thing with A3, that it was suppos to be on earth and all.Then it finished to not be on earth, and he really wanted to bring the aliens on earth. The the only thing he had to do is to do a good story for it, he then saw sketches of a guy with the preds being treated as gods and voila. And the thing of the aliens ( real aliens not the aliens, lol) having built the pyramids and all. It was all logical for PA. So its not a so dumb idea and i think that your the only one complaining about it. I mean didnt you wanted to c aliens on earth too? ANd to put the fight in space wouldnt have been bad either, that is mostly what will happen later in the sequels. Hopefully.