I mean... What constitutes a massive failure? Other than DCA/Superstar Limo, nothing the parks themselves have done has been terribly disastrous for Disney or Universal in the last 20 or so years. That's just too hard to do with their histories and reputation.
But attendance is light this year. Luckily guest spending is at or slightly exceeding goals... But that's a very delicate balance to keep.
You want someone to love your new attraction for 2018. So they come back again to ride it, and then they buy a beer at Finnegans and a couple butterbeers. They tell their friends it's awesome and they have to go ride it. You don't want them to say the new rides sucks, and not bother coming until the hot summer is over and crowds die down. Or God forbid not come back until the lagoon show, Potter or whatever else new that isn't universally panned will open.
Voodoo is a profit driven home run. They make a ton of money, and we have something new and cool. So there's nothing wrong with trying to turn a profit.
But this is bad. No way to sugar coat it.