I somehow missed it when they posted a teaser-trailer for a sequel to Donnie Darko called S. Darko:
It’s not clear to me from this what connection if any Richard Kelly, who created Donnie Darko, has with this. (Though S. Darko — that’s Samantha, Donnie’s little sister — is played by the same actress as in the original.) What is clear: it’s straight to DVD. And it has Elizabeth Berkeley in it.