I'm sorry but the idea of the big four is stupid. I always hated it and how some kids try shipping them with each other. What? Jackunzel is a horrible ship (EUGENE PEOPLE!!) and has several holes in it. I don't know how I feel about Mericup, because Hiccup has Astrid. Rant over.
I like the idea of the big four but just a group of unlikely friends, none of the shipping going on because they still have their own separate stories. I wanna make my own crossover with them but Rapunzel still has Eugene and hiccup has Astrid and merida is single and Jack has tootn. But maybe add frozen ppls, helsa and kristanna.
The Big Four by taleofamonkey.deviantart.com on @DeviantArt - Modern-day AU; Hiccup from "How to Train Your Dragon", Merida from "Brave", Rapunzel from "Tangled", and Jack Frost from "Rise of the Guardians"