Not too surprising given that (according to your article) the original has earned $540 million worldwide to date.
For some real WTF have you heard the original ending of the movie before audience feedback told them it sucked:
[spoiler]Gerry [Brad Pitt] [ends up in Moscow and] reaches Karin [his wife]. He explains to her that the cold is the way they’ll win battles, which does her no good because it just so happens she and the kids are in a refugee camp in the sweltering heat of the Everglades. They’re in the type of camp where you have to have something to trade to survive, and it just so happens the one thing Karin had to trade was herself. She doesn’t explicitly tell Gerry this, but after she hastily hangs up the phone we see that she’s in some kind of reluctantly consensual relationship with the soldier who rescued them from the rooftop at the beginning of the movie.
[The soldier coercing his wife] then calls Gerry back and explains to him that he should just stay wherever he is and start a new life like he and Karin have. Gerry refuses to accept this, though, and he embarks on a rage mission to get back to his wife and daughters. Trouble is the nearest port that won’t be frozen is thousands of miles away, so there’s a montage of Gerry, Simon and Segen crossing various terrain until they ultimately end up on a boat. They’re now off of the Oregon coast and they attack the American shore like it’s D-day. And that’s how the movie ends. Not with Gerry having discovered a cure, but with him storming across the United States of America to get Karin back.[/spoiler]
Some of the scenes from Moscow end up in the movie in the montage of fighting zombies around the world.