I loved this movie and appreciated all of the nods to the previous three, but there was a problem. I know a fair amount of Mayan legends, Crystal Skulls, and various themes from the Lost City of Atlantis (check out Greg Donegan's books on Atlantis) whether you think it's relevant or not (it is) and that's why I loved it. It gave me great visualizations from different aspects of other scifi stories and even insight to mythological legends. If you didn't know much about the topics, it was harder to appreciate because not as much was explained. One of the reasons why we all loved 1 and 3 was because they were about historical and religious topics that we were all familiar with. This had some abstract topics that could have used more explaination, but I still loved it. Also Cate Blanchett had a terrible russian accent.