I came to point this out as well.
@AgentV you should also check out the existing topics relevant to this:
Tangentially related, there are also interesting things said regarding other entity’s copyrights and intellectual property, and what you can use in your game here:
Since there are already a few threads regarding this topic, and they all boil down to what’s been said here (copyright in the US is automatic, and you can’t copyright ideas, concepts, or general plots anyway), I’m going to close this thread.