The theatrical cut made several changes from early drafts, including a version in which I Am Legend 's dog survives.

The I Am Legend alternate ending wasn't used in the final cut for multiple reasons. While this ending to I Am Legend maintains the adaptation of Neville dying by suicide, it completely disregards the novel's original reasons for him doing so, as he never realizes that he's unwittingly become the world's villain. Anna and Ethan then set out to find a colony of survivors while taking a sample of Neville's cure, implying that humanity is saved. Neville ultimately sacrifices himself to take out the monsters and allow fellow survivors, Anna and Ethan, to escape.

As he discovers a solution to the infected's condition, the creatures storm his house. I Am Legend's original ending in the theatrical cut sees Will Smith's character holed up in his laboratory as he attempts to find a cure for the virus. The alternate ending to I Am Legend is of course vastly different from the one that made it into the movie.

Monsters from i am legend