Recall that much of the construction of the original WWOHP happened during the last recession.
In response to the last recession, Disney offered deep discounts to bring Guests back into the parks. Those huge discounts severely hurt margins, with Disney Parks & Resorts reporting 3 of its 4 lowest margins ever from 2009 to 2011. From 2008 to 2010, domestic revenue fell 6%.
Meanwhile, at Universal, operating margin went from 23.8% in 2009 to 32.8% in 2011. For those same years, revenue increased by 66%.
As Universal demonstrated with WWOHP, new lands with appealing IP's help no matter what the economic climate.
Disney would be wise not to make the same mistake twice.