These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Voyage of the Dawn Treader
Fridge Brilliance: Caspian's ship is named "Dawn Treader". And the crew's journey is to ultimately find the Utter East that both their king and Reepicheep long to see... thus, when they finally arrive at the Utter East, the "Treader" quite literally treads the very Dawn of a new day.
While Coriakin himself turns out to be a Cool Old Guy, Lucy's walk up to the magician's study can get pretty unnerving—walking up a flight of stairs and down a hallway in complete silence, with strange carvings and paintings on the walls, doors that won't shut, and a minor Jump Scare in the form of the bearded mirror.
Perhaps because they're moving closer and closer to Aslan's country, Narnia's equivalent of Heaven.
Cliché Storm: The mist and sword plot created for the movie.
Fridge Horror: Lord Rhoop, the one found on the rock in the middle of Dark Island, has likely been constantly fighting his worst nightmares with no food and no rest for years.
Ho Yay: Apparently, Caspian and Edmund, for some people.
It's not that far-fetched, considering that Caspian spends much of the movie offering Edmund ancient swords he'd been given in recognition of his own kingship. Then there is the very intimate scene of them getting dressed and the touching centre-stage hug at the end.
The mileage in this one varies a lot. Frankly, to some people they just became like brothers and the touching one-hug at the end just accentuates their brotherly connection. After all, Caspian does tell them they are like his family to him.
Considering the movie didn't shy away from incestual subtext (see below), could be both.
Tear Jerker: Reepicheep's farewell and subsequent departure into Aslan's country.
Unfortunate Implications: Despite the green mist appearing to Edmund as the White Witch and tempting him with power, saying "I can make you a man", and "you can be my king", but he keeps threatening her away with his sword. The dark island manifests Edmund's greatest fear; a large phallic monster. Combine that with his jealously towards Caspian and well...