I mean technically we DO have a DreamWorks land in Studios that basically gave Uni the excuse to give HTTYD a full land....
I am VERY happy EU didn't spring for a composite DW land or a lesser DW IP (Trolls). The only series DW has that can POSSIBLY support a whole land is Shrek and MAYBE Kung Fu Panda.
Dragons was chosen due to it resonating with an audience DW wants (those who recently became adults), it having... well dragons, and having an iconic locale with distinguishable aesthetics that differentiate itself from other lands. There's no other land in Universal or Disney that will look like Berk, Shrek would resemble Fantasyland and KFP would also have a unique aesthetic but would be too close to Real-World architecture. Dragons has those iconic statues at the entrance of the land, houses cobbled on top of houses, the dragon woodwork, the only issue I can see at a glance for the land is that there is no Flight of Passage equivalent for it, and that's the biggest miss throughout the whole park.
I hope down the line Dragons gets the flight simulator it desperately deserves and ties the whole land together, because if they maintain those flying dragons post opening, this could be the ultimate sleeper hit, not just for EU, but for this current investment wave of FL theme parks.
I'm biased because I love this series, I can acknowledge that, but I believe this was the most important land to get right in EU and will blow people away once it's open.