When Riddick steps into the identifier for the emergency beacon, the stats on him read: "Richard B. Riddick. Escaped convict. Murderer." This is how he introduced himself to the character of Paris in Pitch Black (2000).
Vin Diesel's original vision was to have the "Chronicles of Riddick" become like J.R.R Tolkien's Middle-Earth. Pitch Black (2000) was to serve like "The Hobbit", to be a stand alone film to establish the universe, and to have a trilogy of the "Chronicles of Riddick" serving like "The Lord of the Rings".
Vin Diesel wanted the movie to be shot on 35mm film, but due to the film's low budget paired with a large number of visual effect shots, the movie had to be shot digitally. As a compromise, David Twohy added a subtle film grain effect throughout the film.
"Riddick" takes place five years after the previous film "The Chronicles of Riddick", which was set five years after the original film "Pitch Black". Which means, "Riddick" takes place a decade after "Pitch Black". "Riddick" was released thirteen years after "Pitch Black".
The trivia items below may give away important plot points.
While in chains, Riddick "predicts" that he'll kill Santana within a sixty second window. After doing so, he exclaims, "I like to be a man of my word." Riddick can be seen in similar circumstances in previous installments. In the animated short The Chronicles of Riddick: Dark Fury (2004), Riddick told the head merc Junner, that he would bury his weapon in Junner's eye. In the film The Chronicles of Riddick (2004), he threatened to kill a prison guard with a metal "tea cup" after witnessing his abuse of Kyra. Each opponent met his end exactly how Riddick predicted.
When Boss Johns questions Riddick about the death of his son, Riddick tells Boss that he didn't kill his son, which Boss Johns doesn't believe Riddick. In Pitch Black (2000), Johns was killed by a Bioraptor in the aftermath of a fight with Riddick which Riddick slashed Johns in the back with a knife and Riddick left Johns at the mercy of the Bioraptors.