Don't these people do any market research? They would do a lot better having Elsa's baby be fathered by Jack Frost, Hiccup, Harry Potter, or Thor.
I base this on the relatively popularity of crossover fan fiction involving Frozen. Frozen/ROTG is about 500 times as common as Frozen/Spiderman, Frozen/HTTYD about 40 times as common, Frozen/HP about 18 times as common, and Frozen/Thor about 12 times as common.
I base this on the relatively popularity of crossover fan fiction involving Frozen. Frozen/ROTG is about 500 times as common as Frozen/Spiderman, Frozen/HTTYD about 40 times as common, Frozen/HP about 18 times as common, and Frozen/Thor about 12 times as common.