My understanding is to fight back. The last sentence is a dialogue between kc and kc's mother who embodies the moon consciousness: "Let's start". My understanding is a counterattack against the nano-group, and at the end of the film, it also means that the nano-group is not invincible. The film also said that only a small number of nano-clusters have discovered the moon, which does not mean that other nano-clusters will not discover the earth, and their existence is still a threat to human survival. And the film also said that there would be a sequel. My understanding is that I will fight back in a sequel like Independence Day.