Universal vs. Disney. Universal is still losing big. End of chapter.
Now. In 10 years? After the 3rd gate? After both of the current parks have been extensively overhauled? After their groundbreaking water park? After 10,000 more rooms? After 10 years of steady growth (even 1-4% yearly would get both parks well past 10 million guests each)
The only way they could be losing is if they were distinctly trying to compete with Disney.
They're not trying to be #1 - they're trying to be themselves. Universal is constantly thinking, 'now wouldn't it be great if we...'. Rather than let Potter carry them through the 2010s, Comcast reinvested in their resort. As a result, it's set up to succeed in the long term.
Universal is just trying to increase their market share. Which by 2020, they certainly will have done. Both Universal parks should be at 10 million or so in 6 years' time. That's not me being a delusional fanboi. It's just logic. With all of the additions coming to UO over the next 6 years, 1.7-1.9 million for each park over a 6 year period is reasonable. Honestly, that's probably an extremely conservative estimate.
But considering AK and HS have super inflated numbers (closer to 8 million than 10 million), Universal isn't 'losing'. And with only momentum in front of them, I don't see them slowing down.
AK will do fine. Epcot will do fine. MK will do fine. But HS? With only TSMM, RnRC, ToT, Frozen Fun and Star Tours potentially by the late 2010s? Disney fanbois are crazy pessimists if they think 'just' those 5 can sustain attendance growth. All of the closed shows are going to crowd the streets big time. And DHS is going to be an absolute pain to walk through from 2017-2022.
USF and IOA aren't seeking to take out WDW, and as a result, will quietly surpass DHS unless Star Wars Land and the Pixar expansion are fast-tracked for 2020.
I don't see DHS perpetually going up just because of its location. Eventually, even the pixie dusters will notice how desolate its offerings are.