Maybe you haven't noticed, and nobody would blame you, but Poe Dameron wears a necklace in Star Wars: The Force Awakens and Star Wars: The Last Jedi. That alone could serve as something you may have missed, but the necklace has some significance. Those who have read the expanded universe novels and comics may be familiar with Poe's mom, Shara Bey, who was a heroic Rebel pilot. Poe's necklace actually has his mom's wedding ring on it, which is a pretty deep reference to the expanded universe and a signal of Poe's love for his mother. It's tough to spot in the movies, but it's there if you really look for it.
Is Poe Force sensitive?
Poe Dameron is known as the best pilot in the Resistance and that is displayed very effectively in Star Wars: The Last Jedi. He's on point and helps lead the Resistance to a big, yet costly victory early on. So how is it that Poe is able to do these things in Star Wars: The Last Jedi and survive? One theory is that he's Force sensitive. Digging into the expanded canon a bit, Poe actually grew up under the roots of a Force tree his mom planted, which was stolen from a vault guarded by Palpatine. Perhaps his proximity to the Force helps him to be the greatest pilot in the Resistance. Or maybe he's just a really good pilot.
Snoke's Praetorian guards.
There are references to the original Star Wars trilogy present in The Last Jedi. One such callback comes in the form of the red guards protecting Supreme Leader Snoke's' throne room. The guards bare a striking resemblance to the Imperial guards seen protecting Palpatine in Star Wars: Return of the Jedi. In this case, Snoke's Praetorian guards, while similar looking, are actually built for action. Though they all meet their demise at the hands of Kylo Ren and Rey, these Praetorian guards are very capable of battle, something we never got to see Palpatine's guards do.
Admiral Raddus reference.
One thing Star Wars movies are very good at doing is introducing characters who get very little screen time, but managed to make a big impact. This is something that Admiral Raddus managed to do in Rogue One: A Star Wars Story. As a military general who helped secure the plans to the Death Star, he's an important figure in the history of the Rebellion. As such, it was very cool that in Star Wars: The Last Jedi, Leia's flagship is named the Raddus. Much like his Mon Calamari brother, Admiral Ackbar, Admiral Raddus is clearly a figure worthy of remembering, both to fans and those actually fighting the good fight in the Star Wars movies.
Supreme Leader Snoke was much more than just a hologram in The Last Jedi. We actually get to see the mysterious figure, brought to life by Andy Serkis, in the flesh. Snoke is a rather showy villain, with his gold robe and extravagant chambers. So it may have been easy to miss the ring he's wearing, but the ring is rather significant. It turns out, Snoke's ring. His ring is actually engraved with the Four Sages of Dwartii. These are some very controversial figures of the early Republic and represent some pretty deep inside, Star Wars knowledge. Sistros, Faya, Yanjon and Braata, encouraged exploration of the Dark Side of the Force and were popular figures among both Sith and Jedi. Given Snoke's connection to the Dark Side, it makes sense that he'd be a little obsessed with them.
Admiral Holdo's bracelets.
One of the other important, new characters introduced in Star Wars: The Last Jedi is Admiral Amilyn Holdo, played by Laura Dern. The purple-haired member of the Resistance has a history with Leia and a very distinct sense of style. The character has been explored more deeply in the expanded universe and, it turns out, that style has meaning. The bracelets Holdo wears in The Last Jedi actually represent her home planet, Gatalenta. The bracelets actually show the constellations visible to those who live on her home world. Not only is this important to her character, but shows the painstaking detail that goes into these movies.
Is Darth Revan referenced in The Last Jedi?
The name Darth Revan may not mean much to casual Star Wars fans, but those who obsess over the franchise know the name well. He's a character fans have begged to have included in the new canon and, hopefully, one day on the big screen. It looks like The Last Jedi may have brought us one step closer to that. On the island of Ahch-To, there's a necklace with a red crystal on it. Most likely, a kyber crystal, which is what powers lightsabers. Going outside of what is actually seen in the movie, it's been revealed that this crystal belongs to a "Jedi Crusader," via the movie's visual dictionary. The only group ever known as Jedi Crusaders were founded by the Jedi Knight Revan, who eventually became Darth Revan. It's a bit of a stretch, but this could be the first serious canon link to Revan in the movies.
A shout out to the Beastie Boys.
J.J. Abrams reportedly loves the Beastie Boys, so it's become a tradition now to name new aliens who hail from the Abednedo line, introduced in Star Wars: The Force Awakens, after Beastie Boys songs. The Resistance pilot in The Force Awakens is named Ello Asty, a reference to Hello Nasty, for example. In The Last Jedi, an Abednedo by the name of Slowen-Lo is spotted at Canto Bight. This is in reference to Slow and Low by the Beastie Boys. It's also worth noting that Slowen-Lo was voiced by Joseph Gordon-Levitt.
"I have a bad feeling about this."
Fans of Star Wars know the line, "I have a bad feeling about this," as it's often said in the movies. Yet, surprisingly, Star Wars: The Last Jedi doesn't seem to feature a character speaking the iconic line in any form. However, Rian Johnson did take to Twitter to confirm that it is, indeed, said in The Last Jedi. Still, fans haven't been able to pinpoint exactly where. Odds are, one of the aliens in the movie says it in their native language, making it impossible for us to catch on a first watch.
Carrie Fisher's dog Gary as an alien.
Sadly, Star Wars: The Last Jedi is the last time we're ever going to see Carrie Fisher as Princess Leia. Luckily, the movie serves as a beautiful send off to the beloved character. As another nod to the late Fisher, director Rian Johnson decided to give her beloved dog, Gary, a cameo in The Last Jedi. Were you able to spot it? If not, on your next viewing, be sure to keep an eye out at the Canto Bight casino. There, Gary the dog can be seen as an adorable little alien, serving as a great homage to Carrie Fisher.