Re: I couldn't disagree more about the comparison to Dune and Arrival.
It's based on the 1998 short story Story of Your Life by Ted Chiang. He's often considered the best working writer of short science fiction, and I think that even before the movie that was his best loved story. For example, Locus Magazine voters picked it as the best science fiction novella of the 20th century. http://www.locusmag.com/2012/AllCenturyPollsResults.html
So Villeneuve has filmed an adaptions of popular picks for the greatest work of short science fiction, the greatest sf novel, and a sequel to the greatest sf movie without a sequel already.