So... HTTYD is maybe a thing here.
Personally, I could go on about how perfect of a fit HTTYD is for a theme park all day. I feel like a lot of DreamWorks properties, like say, Madgascar, wouldn't fit in a theme park particularly well since they require at least some knowledge of the characters to get much enjoyment out of an attraction. (and in the case of Madagascar, it's pretty much been a dead IP since 2014) But in the case of HTTYD, the draw transcends IP; sure, the movies have made a decent amount of money and a 3rd is still on the way, but even if somebody has never even HEARD of the movies, it still is something that sounds exciting; it's an island full of vikings and dragons, for crying out loud.
And outside of that, the IP is FULL of potential in pretty much every department. The land itself has the potential to be beautiful and rustic, there's SO much they could do with a HTTYD ride, there could be a live show using puppetry and actors, the merchandising potential could give the Pandora banshees a run for their money, and you could even have some fun dining based off a viking pub. Basically, I really hope this HTTYD thing comes to fruition because I think it has the potential to be an amazing addition, deserving of being the first true new island at IOA since 2010.