I personally do not support this kind of movie. Either of the "Almighty" movies nor the older ones such as "Oh God" (with George Burns) or more recent ones like "Leap of Faith". They seem to bring God down to a carnal level, no longer Lord God Almighty, the Holy true God. They make light of things that really have no business being disrespected as they are in the movies.
This movie, which seems to make light of the might work of God in the original flood, is not anything I would personally see and I would not expect other Christians to desire to see such a movie. That said, I did find an interesting review of the movie over at AIG (Answers In Genesis). You might want to give it a read:
http://www.answersingenesis.org/articles/am/v2/n2/evan-almighty-review