Honestly, the whole Jack Frost x Elsa ship I don't get why it's a thing, it just seems to me that the main reason people ship them is that they have the same powers. Well, whoopty-doo, what does that have to do with anything, what does coupling them up based on their ice abilities have to with their characters, in my opinion: nothing. The same can be said for Sub-Zero here. Plus I find pairing characters who are almost the same kind of boring, there's not a lot you can do with them in terms of chemistry and characterization comparisons and contrasts, it just feels safe and bland, and not interesting or challenging. I think what would be more interesting, is if these characters: Jack, Elsa or Sub-Zero, are paired with characters who are like the opposites of them, in this case, maybe characters who have like heat-based and fire abilities, it'd be more interesting because of how the characters' differences compare and contrast with each other, how what makes them different from each other can compliment and benefit themselves and also challenge themselves as characters. But that's just me, I've always liked opposites attracting to each other because it gives me insight into who those characters are and how they work together.