I pray to Suwako that Kyubey ends up taking a trip in Gensokyo. Only potential problem is if he gets his hands on Flandre and tells her he can get her out of the basement. Then we're all fucked.
Isn't the definition of a magical girl narrowly defined in Japan? I think it's somewhere between 9-14 give or take? If so then we're all safe since Flandre is way past her due date being around 500 years old. Though I do have to wonder what series of events would cause Flandre too want to head back into the basment once things inevitably heads south.
Also, speaking of people being past their due date, check out poor Sakuya, and for added hilarity, Yukari.