This review may contain spoilers.
Eternals reveals more about the structure of the MCU itself. This movie spans many years, and constantly has flashbacks to reveal more about the immortal Eternals. These beings have lived on Earth for thousands of years and have been present in so many different points in history. They have even seen ancient Rome! After an earthquake, Deviants start emerging again and attacking the Eternals. Ikaris joins Sersi and Sprite as they go to find their leader, Ajak. However, they arrive at her isolated home to find her killed by a Deviant. Sersi is made the leader by Ajak’s final wish. They soon begin to gather the rest of the Eternals so as to be able to fight the Deviants (only to find they have evolved over thousands of years).
I felt that this movie offers a new perspective on some of the larger events of the MCU. Some viewpoints I hadn’t considered before and facts I hadn’t known were presented in this movie. In addition, I liked the diversity of characters, all of which had very different personalities and powers. There were numerous unexpected plot twists which I felt helped reveal or imply things before the truth came out. Although I generally enjoyed the movie, I felt like it was a little inconsistent with the way it randomly changed time periods.
I do think that this movie is very important to our understanding of the Marvel Cinematic Universe, as it reveals a lot of insight about the origins of the MCU and other details of the MCU which had earlier remained mostly unseen.