Towards the beginning of The Lord of the Rings: The Rings of Power trailer, we get a glimpse of Valar and the Two Trees of Valinor, two light-bearing trees from an ancient age. This is interesting since both trees would have been destroyed by the Second Age, which is the time frame when this series is set.Since the show is covering a lot of the time before the story we've seen in Peter Jackson's The Lord of the Rings movies, this scene could be a flashback to provide context to the show rather than be part of the main story.The trailer presents four main species that will likely be the focus of the series: The Elves, the Dwarves, Humans, and the Harfoots.Fans may not recognize the latter name, but they're actually a particular breed of hobbits, small human-like halfling species that were the main protagonists in the previous movie adaptations.It is unclear whether these Harfoots have an ancestral link to famous hobbits such as Frodo Baggins (Elijah Wood) or Samwise Gamgee (Sean Astin).One of the best parts of the first The Lord of the Rings movie The Fellowship of the Ring was its score by Howard Shore, who ended up winning an Oscar for the movie score.Fans were quick to pick up the fact that a slowed-down version of the Rivendell theme from the first movie's score plays at the beginning of the trailer. This is played when we first see Galadriel, one of the greatest elves in Middle-earth, which makes sense as Rivendell is an Elven town.The Rings of Power is set thousands of years before the Third Age, the timeframe that Peter Jackson's The Hobbit trilogy and The Lord of the Rings movie trilogy are both set.However, there are four characters from those trilogies that will make an appearance in the upcoming Amazon spin-off, based on J.R.R. Tolkien's famous books.Galadriel (Morfydd Clark) and Elrond (Robert Aramayo), who appear in the first teaser trailer, have more of a role in the second trailer. They appear to be arguing with Elrond attempting to persuade Galadriel to give up trying to chase a mystery villain.In the movie trilogies, Galadriel (Cate Blanchett) and Elrond (Hugo Weaving) are supporting characters who help the main characters in their mission to defeat the evil Sauron.The third character from the Peter Jackson movies is Isildur, who only briefly appears in the prologue and flashbacks in The Fellowship of the Ring.Isildur (played by Harry Sinclair) is the one that cuts off the One Ring from Sauron's hand but refuses to destroy it, allowing Sauron's spirit to live on.In the trailer, we meet a much younger Isildur (played by Maxim Baldry) on a boat halfway through the episode.We might have caught a glimpse of the first Ring of Power in the new teaser. The Rings of Power are 20 magical rings forged during the Second Age that gives each user special abilities. The catch was each ring could be controlled by the One Ring owned by the villain Sauron and thus it is revealed that the rings were a plot to seduce rulers to his side.Towards the end of the video, Prince Durin IV (Owain Arthur), the heir to the throne of the dwarf clan Durin's Folk, holds up a silver ring to an unseen character. As he does so, he says ominously: This could be the beginning of a new era.It is never stated that this is a Ring of Power but in the book series, Durin's family does own one of the seven rings that were given to the dwarf race.Towards the end of the trailer, we see a brief clip of a group of knights raising their swords in the air.Many fans have theorized that this could be the Oath of Fëanor, a special oath taken by the Elf king Fëanor and his seven sons to seek and possess gems known as Silmarils, which led to many conflicts throughout the First Age.Since this also happened before the Second Age, this scene could be another time jump backward to provide context to the story.The main antagonist of The Lord of the Rings series Sauron is set to cause havoc again in The Rings of Power. While the trailer does not give a clear image of the enemy, there is a particular shot that hints at Sauron.At the beginning of the trailer, we see a meteor-like object crash near the Harfoots. Later, we see a creature attempting to stand up surrounded by flames. This appears to be where the meteor-like object landed.When the camera switches to a bird's-eye shot of the flames, the image looks distinctively like the Eye of Sauron from The Lord of the Rings movie trilogy. This could be the start of Sauron's mission to claim the rings in the series.The Lord of the Rings: the Rings of Power premieres on September 2 on Amazon Prime. You can see the full trailer below.