This might be out of left field and I know I'm INCREDIBLY late for commenting on this topic, but I now wholeheartedly understand why people were such zealous shippers for Jack Frost x Elsa back then and even now (the shippers are still alive and kicking).
I don't know about anyone else, but aside from the whole ice x ice dynamic (and the whole thing with ROTG not knowing how canonically old they wanna make Jack), I personally think it's actually a rather great pairing if we look at from a story telling angle.
Aside from the obvious tragic nature of Elsa falling for an immortal being (not like we haven't gobbled up pairings like that before), I think a relationship---or heck, even a friendship would've been a great thing for both of them. ESPECIALLY if we're talking about how Elsa was as a person early on in the movies.
Now, that's not to say I agree with the whole, "dating to fix the other person" thing, but I do headcanon that Jack probably would've helped Elsa realize she can be who she truly is. In more ways than one, I think they would've influenced each other to be better people and help each other regarding their isolation since they both start off as characters disconnected from the world(s) around them.
Especially now that Elsa can ALSO communicate with the wind who's dubbed Gale (how convenient, Disney), I think it gives them more ground to work with and would allow these characters to relate each other in ways other characters may not be able to with them.
I understand if people DON'T ship it, but you gotta admit there's a LOT of juice to squeeze from these two (fanon-ically) interacting.
Elsa loves to watch Titanic. It combines three of her favorite things: a beautiful woman with deep desires, nautical horror, and the cold!
So she shows it to her best friend who also loves these things, Jack Frost.
They watch the whole movie and Jack is on the edge of his seat. Although, he wishes there was a bit more whimsy and a bit less —sorrow and morbidity. Elsa tried to tell him the whimsy was in Rose’s hopeless romance and promises. He was not convinced. It wasn’t until the very end that it clicked as to why Elsa showed him the movie —or at least thought she did.
“Elsa! This movie is about me!” Jack exclaimed.
“What?!” Elsa is confused.
“This movie is about me. And my sister! She’s Rose —well minus the whole romantic, sexual desire thing. People always take creative liberties. It’s like how people always insist to make movie adaptations with catwoman instead of Robin…”
“Jack what are you on about?” Elsa is literally dumbstruck, but Jack is on a roll.
“Jack Dawson. His name is Jack and he falls into the water, freezing to death while holding the hand of the person who most admired him. That’s me! They stole my origin story Elsa!”
“Okay? And they stole my origin story from the snow queen. Nobody is special anymore. Trust me, I know. They tried to sue us.“ Elsa is unamused with Jack’s realization and continues playing the movie. But Jack stops her.
“I refuse to accept that Elsa. I am the original! Why did they name him Jack then if I wasn’t inspiring, hmm?” Jack contests.
“Because there was a Jack from the Titanic?”
“Ugghhhh.” Jack gives up. “Fine.”
“Y’know, before you went on this rant I was just going to point at the screen in a goofy voice and say…”
And they say in unison:
“Oh my gawd that’s so you/me-coded”
They laugh, cry, and smile as they finish the movie.