No Second Season
Re:Creators is a complete story with a definitive beginning, middle, and end. Almost everything returned to the status quo and the protagonists went back to their daily lives, except for Meteora and Megane. Both respective characters cannot use their powers anymore as well. Thirdly, Altair got herself a happy ending. Everything is resolved. To ask for a continuation would be to start a whole new story, and given the nature of the first story, it'd end up just being a repeat of the original. Please understand that this is a one off tale, nothing more, nothing less.