Originally Posted by Rock Sexton
Semantics. They wanted Earth for their own. The story was written so that their other bases were now inhabitable. Earth became the only place. CONVENIENT. Isn't it also convenient that the Codex ended up on the only place they could build a new world on.
I have no idea why some people have a problem with Jane finding the Aether. I certainly didn't care because it didn't take away from my overall enjoyment of the film.