It follows thusly: I am Legend the novel, The Last Man on Earth, the loosely adapted Omega Man, and finally, I am Legend the movie. This one took some liberties but captured the declining mental state of Neville better than any of the other film versions.
Dude, come on. I know you well enough to know that you HAVE to have forgotten Matheson's preposterous explainations for stakes, aversion to sunlight, re-animation, crosses...etc.
You'd butcher anyone else for such artless prattle.
He had a great idea, but his story sucked!