Links to threads on 'Richard ("Donnie Darko") Kelly News...' (Oct 2003), 'Donnie Darko, [SPOILERS THROUGHOUT]' (Nov 2003 - May 2008) and 'Donnie Darko Director's Cut, To premiere in Seattle on May 29th' (Apr 2004 - Feb 2005).

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'Darko' sequel adds two
Elizabeth Berkley and Briana Evigan have boarded "S. Darko" (aka "Samantha D"), the sequel to "Donnie Darko" being directed by Chris Fisher. Ash R. Shah is producing.
Ed Westwick ("Gossip Girl") and Justin Chatwin ("The Chumscrubber") also are in the movie, which stars Daveigh Chase, reprising her role from the original cult classic.
The story, set seven years after the first film, follows Donnie Darko's sister, Samantha, who, in dealing with her broken family, flees town with her best friend (Evigan) when they are plagued by bizarre visions. . . .
Berkley is playing a speed freak-turned-Jesus freak whose sentiments about ridding the world of its exponential sin are rivaled only by her infatuation with her dreamy pastor. . . .
Hollywood Reporter, May 29

Oh, this could be much worse than I originally feared...

I feel like I'm watching a train-wreck happen in slow motion.

'S. Darko' Star Briana Evigan Defends 'Donnie Darko' Sequel, Which Has Fans, Writer Of Original Flick Up In Arms
Calling the script "very twisted," the 21-year-old actress also said that "S. Darko" will interact with the events of the original film, à la the "Back to the Future" sequels. "We just come back [in time] and change what happened in the first one."
In addition to Kelly, the film is progressing without any participation from "Donnie Darko" stars Jake and Maggie Gyllenhaal, Drew Barrymore or Jena Malone. One character that does return, however, is Frank the giant rabbit guy.
MTV Movie News, June 5