The series 3 finale closed all of the loopholes. now there were the Jana Bites, but I don't see the series coming back from the ending they gave. They'd need to get Maddy and Rhydian both back.
I hope so but Maddie as to say yes because she wasn't in season 3 because she want to college but everyone want her to stay if 你 don't believe me check in Wikipedia 或者 Google.