The first understory to this movie was the promotion of global warming. The first reports that came out from Christian Cinema about 18 months ago reported that the script said that God was angry with man and was going to destroy man for destroying the planet he gave us, not because of their evil deeds.
Other Christian movie reviews say that man Turned evil , because of their bad climatology practices, which made them crazy because of too much sun, etc.
Many say the message is very subtle, but it does have zero to do withe Bible and 100% to do with pushing forward global warming. The flood is being played as an environmentalist disaster, the earth is dying because man messed it up, not because he was evil. Russell Crowes Noah is said to be like the Gen 6 equivalent to AL Gore.
Be careful here folks.