2012

The great disasters of the "galactic alignment" in 2012 were supposed to have occurred on December 21st, the day of the solstice. The filmmakers decided to move those events up a few months, to midsummer. This relieved them of having to decorate the sets for the winter holidays.

A background character can be heard warning that the ship's compartments are flooding progressively. But all ships have been built with truly watertight compartments for nearly a century. Certainly a futuristic ship of this size couldn't sink due to 1 door being open. The fact that the watertight compartments had metal grates above leading to the zoo area negates any watertight design (and sense)

There are no opening credits at all, except the Columbia Pictures logo and the movie title "2012".

There was an alternate ending that was featured on the DVD. After Captain Michaels announces that they are heading to the Cape of Good Hope, he tells Dr. Helmsley that he has a phone call waiting for him. Dr. Helmsley discovers that his dad Harry is still alive. Harry tells his son that he, Tony (whose arm is in a sling) and some of the passengers and crew survived the mega-tsunami that struck the cruise ship Genesis. Captain Michaels states that they should have a visual on the Genesis shortly. After Kate thanks Laura for taking care of Lily, Laura tells Jackson that she liked his book. Lily then announces that she sees an island, on which the Genesis has run aground on. The Arks arrive at the shipwrecked Genesis and rescue its survivors.