Im not sure about this. My opinion of Frozen was that it was a decent film with a good song which had a classic line within it. Take "the cold never bothered me anyway" out of Frozen (which a sequel will as it wont have that song) and it's probably just something I'll catch on dvd at some point.
Spectacular looking animation... I really couldn't tell whether that ocean was CGI or real. But still keeping the characters looking just cartoony enough not to bring the uncanny valley into play. These Dixar folks know what they're doing.
Elsa looks like she's auditioning for the Avengers.