Now, if only someone would remove the dirt, hair, and scratches from the film, then we would have a true remaster on our hands.
Edit: Or at least as a separate project, in case some people like the dirt, hair and scratches that are in the 35mm Version.
As available 35mm scans go, these are remarkably clean to begin with. But I too would welcome such a project. In addition, reproducing the extended cuts of TTT and ROTK and “35mm-izing” the extended cut footage to match the rest.