I Am Legend Again?

Those who have yet to see I Am Legend (though I can't imagine why--Will Smith is the biggest movie star in the world and the movie was very good, in my opinion) should be aware of spoilers in this post. An AICN tipster is reporting strange things about a potential follow up to Smith's 2007 sci-fi thriller. While rumors of Smith mulling a prequel have circulated in the past, AICN's tipster is now reporting that Warner Bros. is considering making a direct sequel. Those who saw the first film will remember Smith's Robert Neville dying in a fiery explosion (though the alternate ending has him surviving), so a Smith-driven sequel seems flat out strange. Will they rewrite what most folks saw in theaters and have the fan-preferred alternate ending serve as what actually happened in the story's continuity? Or is there another device they'll employ to bring Smith back? Or is this simply another rumor waiting to be debunked? We'll keep you posted on how this develops.