You could make it into an original if you wanted. But don't scrap the BSG parts simply because there's a new movie planned. Good grief, fanfic writers don's stop writing because there's a new show or a movie or a remake or a book or - well, you get the point. So go ahead with your dream - give credit where credit is due to the originals involved and just enjoy it, along with others who'll take a gander along the way.
