That set has zero appeal to anyone except maybe some Bionicle fans. And some of them will be disappointed that it's not real Bionicle but rather printed system bricks.
What I don't get is the theme restriction for an 18+ set. Of course, it's not truly 18+ but Lego recognizes that the target audience is adults who had Bionicle growing up. But then why tie it to City and Ninjago, which are kids themes? I increasingly believe that management has no idea about their products and customers.
The more I see the Brown Astronaut, I kind of want to see what a "Browntron" mockup could look like. Additionally, if someone were to post an army of the adorable baby astronaut, I swear I will freakin' die from a cuteness overload. Haha.