This does raise the question of where exactly do the space monsters come from now. In the original, the idea was that the galaxy as a whole is a living organism (individual star systems are just cells) and that the monsters were big antibodies. Humans are a disease, but we were benign as long as we stayed in our own cell. As soon as we started to spread, we triggered the immune system. The solution is to kill our own host. So with the host gone, where do more antibodies come from?