Well there aren't many movies about vikings unfortunately, being a huge fan of vikings myself. But there is Pathfinder and The Outlander. The first is about a viking boy who is adopted by Indians after his father's ship crashes, and vikings subsequently come back. The second one is more sci-fi-ish I believe, where a man crashes his ship and brings an alien/monster and some vikings fight it off. You can always check IMDB, I'm probably killing the descriptions of the movies, although I have seen Pathfinder, haven't watched The Outlander yet.