The more I think about this whole Frozen-Maelstrom-Norway Pavilion situation the more I question this and similar threads.
Cars, which earned a worldwide gross of $461,983,149, received an entire land at Disney California Adventure.  There is not one or two attractions.  Instead, there are three attractions and three quick-service dining locations.  Moreover, Disney invested heavily in the construction of Cadillac Range for a truly immersive experience.
Frozen earned a worldwide gross of $1,273,738,009.  Why on earth would Disney's highest grossing animated film find a home in the Norway Pavilion and, specifically, Maelstrom.  Where is the North Mountain?  Where is Oaken's Trading Post?  Mater gets a junkyard jamboree while Olaf gets nothing?  This makes absolutely no sense at all.
Anna and Elsa have enjoyed 5 hour wait times; fan frenzy resulted in a change in rope drop procedure.  Frozen Fun Summer premium tickets sold out within days of their announcement.  I am no insider, but a Frozen Maelstrom would seem to be a temporary overlay until something larger is rolled out.