Looking at the screenshots posted so far, it does look like a new master but not necessarily a new scan, because the clarity/detail level is comparable to or worse than the 2004 masters.
It might be that they simply found the 2004 digital masters before the color grading and sharpening and upscaled them and gave them a new grade, which would have been necessary for HDR anyway.
Harmy,
I’m sticking with your Despecialized editions!!!