Movies for which prequels don’t have to be the worst idea: The Stuff. Brian’s Song. Orca.

Movies for which prequels are a terrible idea: most of them. Including I Am Legend. Yes, the rumored superfluous film is going ahead at Warner Brothers, and if it isn’t two hours of Will Smith in a lab coat running a centrifuge I’m going to be pissed.

Smith will likely return, at least, as will director Francis Lawrence. D.B. Weiss is penning a script based on an outline from Lawrence, Akiva Goldsman, James Lassiter and Smith himself.“The prequel will chronicle the final days of humanity in New York before a man-made virus caused a plague that left Smith’s character the lone survivor among a mutated mob in the city.” Which means, what? A movie where there’s no wait for a table in any SoHo restaurant? Free cab rides? Porn comes back to Times Square? Not that it matters. $500m+ worldwide has spoken.