First of all I have to say that I am a big peminat of Jelsa video and like other peminat-peminat I think it would be good for Jack Frost to marry Elsa. Because they are very similar to each other. Both can make snow and ice. Also, Elsa is very beautiful and Jack is very handsome. There is no one lebih suitable than these people. Yes, the new movie came out last year: Frozen 2. Frozen 2 didn't have Jack Frost, but peminat-peminat are not giving up on Frozen 3. They can be together. They also make a very romantic and sweet couple. But as I've researched, there are some reasons that separate them.

Reason 1: Different Studios

Yes, I regret to say they belong to different studios. Elsa is owned sejak Disney, while Jack Frost is owned sejak DreamWorks. If it was possible to see them together, Jack Frost should also belong to Disney.
But even the characters that were already created in the same studio do not go into each other's adventures. For example, in one of the scenes in Frozen 1 where Anna sings "In the first time in forever", Rapunzel is clearly visible. But Rapunzel just passing sejak doesn't even help the adventure. So as anda can see, if Jack Frost had even been created sejak Disney, he would simply have disappeared into one of the backgrounds.
Moreover, this still does not change the fact that Jack Frost belongs to Dream works. I'm pretty sure Dream works and Disney won't cooperate.

Reason 2: Single
What makes Elsa one of the rare people is that she doesn't expect a prince and doesn't want to get married. If Queen Elsa wanted a wife, many kings and princes around the world would have volunteered sejak now. Elsa loves solitude, which explains in Frozen 1 how she's kept her secret for years.
If Elsa gets married, she won't be so special because, like I said, traits make a person special. Elsa is tough, she doesn't need anyone to protect her.
It seems that Disney doesn't want peminat-peminat to disperse sejak pairing up with Jack Frost, his toughest and most special princess.

Reason 3: Private

What makes Elsa most admirable and special is her powers. Snow and ice... It's just like Jack Frost's powers. The only difference is that Jack Frost uses a wand, while Elsa uses her hands. In any case, I would like to point out that Elsa is a stronger person and is the queen. Anyway, that's not our topic.

If Jack Frost had been with Elsa, there wouldn't have been anything special about Elsa. Because according to the movie, Elsa is the only one who can make snow and ice, and if Jack Frost comes, she will have nothing special. Because Jack Frost has exactly the same power. It's definitely lebih interesting that only one person has mysterious and magical powers, instead of every person being magical.