I think a new petition would perhaps should just make the business case for an OT release.

Disney doesn't care too much about the artistic argument, but if they thought they could make some bucks doing a hidef OT release then that would be far more likely to sway them than an emotional/artistic plea.

Also important to point out that the work is already done, despite claims to the contrary, many of the worst additions to the OT are over the top of original elements, which had to be scanned to add in the CGI.

If Disney think that money is being left on the table, then they may actually do a release.