The thing is, Disney could still bring Elsa and Jack together. That’s because DreamWorks (the conpany who made the Jack Frost movie) doesn’t own the character Jack Frost. Jack Frost is a mythical figure about whom stories have been told for centuries. DreamWorks has made only one of many film adaptations of this character. Disney has the right to make its own adaptation of Jack Frost, or to have the character appear in a Frozen movie. (Of course, he won’t look exactly like Jack Frost from DreamWork, but it would still be amazing)
I know a lot of people prefers Elsa to be single. And a few ships her with Honeymaren instead. But honestly, Jelsa has been my ship since i was a kid. From my point of view, there's something about them that just would make sense. How similar they are and how i imagine they could understand one another if there happens to be a crossover. So i will not give up on this ship. My childhood ship. Even if hoping fot it to sail is merely a childhood dream.