But that does not mean that you make a sequel/prequel to every film - even films that don't deserve it!
The Will Smith-starring I Am Legend was a stand-alone film, based on the wonderful novel by Richard Matheson. Now it would appear that the film made so much money that a prequel is in order.
Be warned SPOILERS FOLLOW about I Am Legend so if you haven't seen it yet...
Will Smith bloody dies in the film - and the movie told us about the events that took place before the film's main narrative. So why on earth make a frickin' prequel?
Cash-money, that's why.
Considering that Smith bit the big one at the end of the original, a prequel is the only way that the A-list star can return.
D.B Weiss is scripting based on an idea by Smith, Akiva Goldsman, James Lassiter and Francis Lawrence.
Do yourself a favor - skip this cash grabbing follow-up and buy Charlton Heston's Omega Man and Vincent Price's The Last Man on Earth instead!
What will it be called? I Will Be Legend?