There are a lot of reasons that people are "skeptical" of it (although I'm not sure it's the right word to use...it's just a surprising element considering a lot of components). For one, Universal's very own Jurassic Park River Adventure has a hard time maintaining outdoor animatronics. Second, Universal's green initiative has made it so that fire effects are absent from all future attractions, making the concept of a fire-breathing dragon seem somewhat contradictory. Third of all, any animatronic being seen by hoards of people consistently throughout the day means it will have long operating hours and no downtime (you can't close a street-corner down for refurbishment like you can for JPRA when their animatronics get rusty).
So there are a lot of things that make this prospect intriguing, independent of any Disney bashing.