Christianity Today has a good interview with Darren Aronofsky which provides some background on the material in the new Noah movie. It seems that Aronofsky and Ari Handel researched a wealth of ancient, primarily Jewish, traditions and texts for material in the movie. These traditions/texts ranged from the Book of Enoch, the Jubilees material, the Genesis Apocryphon text from Qumran and other ancient collections such, Genesis Rabbah, the Talmud, etc. Some of these date from well before the time of Jesus and down to a period 500 years after the New Testament.
I’m not sure how much material from these texts will be used, but here’s just some of the Flood related content in three of them: