The connection of Anakin's Theme to theh Imperial March is well-documented. This is thematic score. I have yet to see any evidence that JW took a bit of non-thematic score and turned it into DOTF or ATS. "Bridging the gap" means connecting the themes. Honestly, I've seen these claims before, which started out with an over-eager fan claiming that JW had really written DOTF back in 1980 and hidden it in the ESB score.