Kappas become rich from selling, repairing, and upgrading them. People also don't call Reimu to solve incidents as often as before, because they can do it themselves now with these armors. Because of this, she conspires to destroy all these armors in order to "get her job back". Since the kappas don't want this to happen, they fight Reimu to prevent this from happening, and humans who side with the kappas fight against her as well. Now Gensokyo is in a state of mess... What has science done?!?!?!
What if the truth behind Shinki and co. not showing up again is because Alice betrayed and killed them all?