Unfortunately, no, that scene was never finished from what I understand. At the press conference, Francis said that "all" the footage we've already seen will be on the suplemental disc, plus one scene we haven't - the alternate GF3 opening.

I don't believe him with the "all" as that would mean tiny little clips of extended scenes and such that I've noticed in the Saga. But I'm sure he means "all"/most of the extra scenes, not necessarily all the footage that has been shown... we'll just have to wait and see...

JG