And is their success guaranteed? Can't top pigs with pigs.
Still do not think it will be popular, sure the Disney name is big, but Avatar isn't. Even New Fantasyland was not that hyped up until right before. Disney today is being left in the dust of companies like Uni who are obtaining popular and successful brand along with being on top of their game with construction and social media.
Take the series of talks Uni had when they announced Potter p.2, sure it was awkward but Disney never does stuff like that. Secondly Uni fully announced potter a year before the opening, Avatar was announced in fall of 2011 and they just broke ground. The excitement is done, yet Potter will be open before we know it and this sustains the hype surrounding it.
Disney needs a serious wake up call, people don't care about blue monkeys they care about popular culture. If Disney wants more people at the parks and wants a potter/WTFUDN (whatever the flick uni does next) swatter then add a Doctor Who and Star Wars land, people will come. They will not come in mass droves for Avatar.
And yes DAK will have an attendance boost, but nothing so big that it really fights with Potter.