Only after re-watching Treasure Planet recently, I realized why the planet itself has two rings around it - they're forming a giant X! This makes perfect sense since you don't have to dig in/through a particular spot to get the treasure - you have to get through the very crust of the planet itself! ...Or just go through the right door.
This has probably already been mentioned, but the name of the ship in the movie was a huge bit of fridge brilliance for me. In the original novel, the ship used to sail to Treasure Island is called "Hispaniola". In Treasure Planet, it is called "R.L.S. Legacy". What are the initials of the original author of Treasure Island?
There's also the fact that, given the setting ( Treasure Island... IN SPACE! ), the story's been changed enough that the ship isn't really the Hispaniola anymore... but it's carrying on the Hispaniola's Legacy.
Notice when Jim is next to his mom, he has a case of Teens Are Short. When he comes back, Jim is slightly taller than her now. Why? In a literal sense, Jim had a growth spurt, but in a figurative sense, Jim finally grew up.
When Scroop cut Mr. Arrow's life line, he didn't just pay him back for the earlier reprimand, he also "paid" Jim back for the "Bright Eyes" comment. The moment he said that Mr. Arrow's lifeline wasn't "secure" he gave a very big emotional payback to Jim, by indirectly "blaming" him for Mr. Arrow's death.
Sarah mentioned to Doppler that Jim had a habit of always bringing home a pet. And by the end, he does bring home a new pet: Morph.
Why was Leland Hawkins's face not shown once during the flashbacks of "I'm Still Here"? Jim never looked up to him as a father.
Or more poignantly, Leland was home so rarely, and paid so little attention to his son, Jim hardly remembers what he looks like. The only impressions he ever made on Jim were the times he neglected his family and ultimately, abandoned them.
Following the above Fridge Brilliance, it's fitting that towards the end, Jim has a clear picture in his head of his true father figure: John Silver.
There's some Fridge Heartwarming when Silver is forced to choose between saving Jim or his treasure. He holds onto the treasure with his mechanical arm, but when he decides to save Jim, he saves him with his human arm.
Jim at one point asks Silver what happened for him to become a cyborg, to which Silver solemnly replies that "You give up a few things... chasing a dream". In the end, Silver is faced with the decision that he has to let Jim die in order to save the treasure, but he ends up saving Jim instead. Turns out, he was willing to "give up" some of his limbs for his dream, but he ultimately was not willing to give Jim up.
It also becomes sobering when you realize there's a double meaning when Silver says "Blast me for a fool". He's not just chastising himself for giving up all those riches. If he really did lose his limbs trying to chase Flint's Treasure Trove, then he's recognizing that he's essentially lost his limbs for nothing.
Speaking of limbs, there's a strong symbolism in how Jim reacts to Silver's cyborg arm. Both times, he offers Jim to shake on it (when he's introducing himself, then later when he's making a deal with him). And both times, Jim doesn't take his hand. Why? Because every time Silver offers that particular hand, it only serves to remind Jim of Billy Bones' warning ("Beware the cyborg!"). So Jim feels he can't trust him.
The map-sphere seems like such an arbitrary object - why would Flint need a super-high-tech guide to the one spot in space he'd be bound to remember? - until Jim's discovery that Treasure Planet is the nexus of a Portal Network. Whatever the precursors were, their explorers presumably carried these spheres in case one of them was stranded and had to find their way back through space.
One has to wonder why exactly Flint removed B.E.N.'s memory chip, beyond paranoia. But then it becomes a Fridge Funny when you realize the key word was "BOOBY TRAP!" It's easy to imagine B.E.N. would be unable to stop saying the words "booby trap" because it amused him. Between that and his outspoken personality, Flint knew B.E.N. wouldn't be able to shut up and did what he did.
During the dressing-down in her Cabin, Captain Amelia says she'd "love to chat; tea, cakes, the whole shebang, but I've got a ship to launch and you've got your suit to buff up." Then she runs a claw over his suit. It seems like mockery, and that's how she probably intended it, but since they end up together, it's might subconsciously be affectionate teasing. In fact, it's the same kind of affectionate teasing she did with Mr. Arrow in her Establishing Character Moment. And what does "tea, cakes, the whole shebang" sound like? A date.
Speaking of that moment, her eyes go wide when she sees Doppler. When else do they do that? Oh, yes, when she looks at the map in the cabin later, fascinated, before putting it away. She also manhandles Doppler on a very thin pretext, and name-drops some battle she participated in. Almost like she's trying to impress him. In fact, she completely ignores Jim until Doppler introduces him.
Morph's role in the film is essentially that of the archetypal pirate's parrot. Which lends some fridge brilliance to his shape-shifting abilities - he literally parrots people!
Why does "cannonball", as in the diving term B.E.N. references, exist in a world where cannons shoot "laserballs"?
Maybe there are several different kinds of cannonball, and laserball is just one of those types.
They probably have conventional ammo as well as energy-based ammo in this universe.
Possibly a leftover from when cannon balls of some sort were actually used, sort of like in real life. No one uses cannon balls anymore, but the term is still with us.
B.E.N. might be old enough to have existed when cannonballs were common.
One notable example is how the plot point leading to Silver finding Jim in the storage room, realizing he heard about the mutiny was because Silver went looking for his glasses to get a better look at Treasure Planet. This when later sequences in the film establishes that his mechanical eye can zoom in on objects hundreds of meters away, leaving the question as to what he'd need glasses for.
He was actually looking for a spyglass, not a pair of eyeglasses, and his eye can only see so far...Maybe, say, from one end of the ship to the other, or a bit more. Treasure Planet was a much greater distance away.
So, naturally, everyone knows that in the original story Jim is assigned to the duties of cabin boy... except here, Amelia does it without a second thought. He's one of her employers.
Well, when part of a crew, you have to pull your weight just like everyone else. It doesn't matter if you're the employer or not. If you're part of the crew, you gotta do the work.
She seems to make a point of being a hardass to them in particular. She likely sees them for what they are, landlubbers who need a bit of toughening up if they're going to survive the trip.
Also, I'm pretty sure Doppler was the one who employed her. All Jim did was figure out how to open the map.
Plus it's not like Jim didn't deserve a leisurely ride to the treasure, you could very well count this as boot camp given his track record.
More like Fridge Sadness but, Flint's selfish greed brought about the end of what was no doubt one of the greatest archaeological finds in history. First he twisted and perverted Treasure Planet, then planned to destroy everything, simply to prevent anyone from taking possession of his gold. Even after his death, when he'd no longer need the money anyway! In the end, what happened to the planet is a criminal waste.
During the finale when Jim manages to open the portal Silver zaps through different worlds and briefly a gigantic monster can be seen. This is Space, millions of uninhabitable planets with unfriendly species must exist. How did Captain Flint and his crew weed out the safe ones? Through trial and error?
The point of the treasure vs. Jim scene was to establish that, even with the treasure literally within his grasp and a nice, easy murder by inaction arranged for Jim, Silver has grown to care so much for the boy that killing him for the treasure wasnt something he was able to stomach. And if he was unable to just sit by and let Jim fall to his death, theres no way he wouldve been able to actually murder him either.
The movie didn't portray it but Mr. Arrow's death is probably one of the most horrifying deaths a Disney character's ever been through. Black holes are collapsed masses of dead stars, distorting matter when it gets close to the event horizon. Spaghettification is where the physical object is thinly distorted as atoms are torn apart in collapsing into the black hole. Mr. Arrow's death couldn't have been quick and painless, he had to have at least felt his body being stretched and torn apart as he fell in—and it must've felt like forever to him.