I honestly never expected the Kong AA to be that large because of how his size was represented in the 2005 film. In the Peter Jackson remake, he was scaled at about 25 feet, while previous films had him ranging 40 to 60 feet. Kongfrontation was likely based on those, so I would imagine any AA for Reign of Kong to be closer to 25 feet if they were to show him in full. Otherwise, they can get away with showing half or even less.
In comparison, the Yeti AA (or static figure now) is 25 feet.