If they really want to appeal to a broad audience, they would comb the vaults and pull out some studio outtakes, combine these with a clean transfer of the stereo mix (these have largely already been done), and release these with a surround mix of the album. Steely Dan outtakes have circulated in collector circles and are always fascinating. That would draw in fans who do not care about surround, and those who want surround but do not care about outtakes.
I don't claim to be an expert on all things Steely, but I recall the liner notes to their "Citizen Steely Dan" box set stating that they included the only unreleased outtake in existence, a demo of "Everyone's Gone to the Movies". They could collect singles, B-Sides, and movie soundtrack tracks, but we certainly wouldn't see anything like the Tull or XTC boxes.