Ten Ways to Rewrite a Show

Henry Jenkins in "Textual Poachers" includes a section about ten different ways a show can be rewritten as a fanfic.

  1. Recontextualization - Filling in the gaps in broadcast material and providing additional explanations for characters' conduct. See Fan Wank and Fix Fic.
  2. Expanding the series timeline - Into either the past or the future. See Continuation, Prequel and Backstory.
  3. Refocalization - Shifting attention away from the program's central figures and onto secondary characters (often minorities). See Day in the Limelight, Elsewhere Fic, and Lower-Deck Episode.
  4. Moral Realignment - Inverting or questioning the series' moral order. See Deconstruction/Deconstruction Fic, Alternate Character Interpretation, Perspective Flip, Die for Our Ship and Draco in Leather Pants.
  5. Genre Shifting - Telling stories different in tone and style from those of the actual series. See Characterization Tags, Dark Fic and W.A.F.F.
  6. Crossovers - See Crossover and Fusion Fic.
  7. Character Dislocation - Characters are removed from their original situations, and may be given alternative names and identities. See Alternate Universe Fic and Transplanted Character Fic.
  8. Personalization - "Mary Sue" stories, and stories that break the fourth wall by having characters interact with fans. See Mary Sue, Marty Stu and Self-Insert Fic.
  9. Emotional Intensification - Including the "Hurt-Comfort" genre. See Hurt/Comfort Fic.
  10. Eroticization - See Lemon, Lime and Porn Without Plot.

Of course, these are the rules of fanfic. If you're a pro, just stick 'em on a rocket. If you are interested in more ideas about writing fanfiction see So You Want to Write a Fanfic.
http://tvtropes.org/pmwiki/pmwiki.php/Main/TenWaysToRewriteAShow