There is a factory that makes Gantz balls? What is going on? It seems that it is manufactured and sent all over the world, and these black balls gather teams which have been fighting aliens. Who developed them? Maybe some organization that is trying to fight against the alien force and make sure the human race is prepared. Purely speculation, as there aren't any other clues at this point.
Inaba is a big baby who hasn't done anything worthwhile, and I am waiting for him to pull his weight. Reika is scheming to get Kurono to like her. Kurono is still madly in love with Tae. I am just hoping Takeshi comes out alive.