**There may be a few spoilers - nothing that would actually ruin the movie**
When you say "Noah and the ark" what comes into your head? Noah and his family waiting by the door of a neatly built ark as animals, two by two, walk through the door. You envision a big flood, ending with the ark resting gently on a hillside and a rainbow in the sky.
That is what I remember.
Also, does anyone remember the Nephilim? You know, the sons of God?
From Genesis 6:4 it reads: The Nephilim were on the earth in those days--and also afterward--when the sons of God went to the daughters of humans and had children by them. They were the heroes of old, men of renown.
From Cathleen Falsani's review of Noah in Soujourners:
"The Book of Enoch is a non-canonical book (although Ethiopian and Eritrean Orthodox churches consider it to be part of the biblical canon) traditionally attributed to Noah’s great-grandfather Enoch. It includes “The Book of the Watchers,” which chronicles the fall of the angels responsible for siring the Nephilim — offspring of the "sons of God" and the "daughters of men" mentioned in Genesis 6:4.