It was big news that I Am Legend went through a series of reshoots. One of the big changes was the film's ending, which was reshot to give the film a more commercial conclusion. The special edition DVD hits store shelves on March 18th, for such a new released Blu-ray is only $19, the widescreen version for $14 on sale
http://www.dealstudio.com/viewtopic.php?t=37240&ru=290
and the alternative ending has been leaked onto YouTube.
https://youtube.com/watch?v=b4IgxTk2wr8
I'd be interested to hear what you guys think, so please post your thoughts. I feel that this is a much better conclusion, aside from the voiceover driving sequence which book ends the footage.