While I Am Legend was a $585 million hit upon the original movie’s 2007 release, its upcoming sequel I Am Legend 2 must fix a lot of issues if the follow-up wants to repeat this success. 2007’s I Am Legend was a post-apocalyptic sci-fi blockbuster starring Will Smith. A very loose adaptation of author Richard Matheson’s iconic horror novel of the same name, I Am Legend saw Smith play Dr. Robert Neville, the lone survivor of a plague that turned humanity into mindless monsters. Matheson’s novel featured a twist ending wherein Neville learned that the so-called Darkseekers he hunted were actually living, thinking beings, but the adaptation jettisoned this.
https://screenrant.com/i-am-legend-2-questions-mysteries-answer-will-smith-darkseekers/