The first reactions to Walt Disney Animation Studios' highly anticipated sequel Frozen 2 have arrived. The follow-up was a long time coming, as the 2013 film was an absolute smash-hit, soaring to $1.2 billion at the box office, winning a couple of Oscars, and infecting the general public with the earworm "Let It Go" for years on end. But instead of jump right into the sequel, Disney played it slow and steady, allowing directors Jennifer Lee and Chris Buck to take their time in finding the right story to tell. But now they're back, and Frozen …