...except for "The Plan" and "Caprica", of course, and the comics, and whatever other ancillary stuff remains in the pipeline. I keep expecting Ferris Bueller to appear somewhere on the edges of the BSG-verse and say "you're still here? It's over! Go home!" Except the truth is, there's always something else...
For instance, being "a writer," I think it would be interesting at some point for the actual episodic scripts to be released. There was always material that was cut on stage or left on the cutting room floor, and the episodes themselves were sometimes restructured. I'm not sure how the scripts would affect "the canon" of the series, yet another topic for spirited debate. Is the series "the series", or is it the extended DVD cut(s), or what? Personally, I'm not sure it matters... more information is just more information, fun for those interested and easily ignored for those who aren't.
And aside from that, the scripts are a fun read. All the writers had different prose styles and intriguing ways of presenting events and characters. I still remember an action line from an Angeli script that described Col. Tigh as a "wrecking ball with whiskers."
So maybe that's a possibility down the line... who knows?