The answer of course is..."never." Because this is Universal Studios we're talking about here. If the "1978 Battlestar Galactica" series had been owned by any other movie studio in Hollywood, we would have seen a "Director's Cut" about 12 years before now. Because any other movie studio in Hollywood would have realized about 12 years before now, resurrecting and salvaging as much of Richard A. Colla's original footage as possible, and reconciling it to Alan J Levi's footage would be the smartest commercial venture one could do.
A project like this could and would never happen because Universal Studios still hates the "1978 Battlestar Galactica" series, and the project itself would be "too cerebral" for the idiots in the "Black Tower" to wrap their thoughts around.
The underwhelming and shameful release of "Battlestar Galactica - The Complete Epic Series" in 2003 on DVD failed to include every single deleted scene from "Saga of a Star World." The typical trait of Universal Studios doing everything "half ass" or not at all when it comes to the "1978 Battlestar Galactica" series.
Scenes still missing from "Saga of a Star World" and never released on DVD:
1. Starbuck (Dirk Benedict) storms the bridge and demands to know from Colonel Tigh why the Galactica pulled out of fleet formation. The scene immediately after Starbuck crash lands his Viper and is embraced by Athena.
2. Additional footage of Starbuck and Boomer in the Carillon casino.
3. Additional dialogue (on the bridge) after Adama informs Colonel Tigh of his intent to resign from the Council of 12.
4. Additional dialogue in the council chambers of the council simultaneously (1) discussing Adama's resignation (2) Sire Uri hoarding food, and (3) lead-in dialogue to Apollo interrupting the meeting to discuss going through the Nova of Madagon.
5. The footage of Jim Peck (instead of Jane Seymour) on the surface of Caprica doing a live news broadcast.
6. More footage of the Ovions and Cylons interacting on Carillon.
A project like this should have been done long before now. But it never came to pass because of Universal Studios relentless pre-occupation with turning the simplest things into "Rocket Science" when it comes to the "1978 Battlestar Galactica" series.