So what a shame it was when Guardians of the Galaxy Vol 2 was released on UHD BD. It did not contain the larger aspect ratios on the disc. Luckily the 3D version did. And lucky for my wallet, the Best Buy Steelbook came with both the UHD and 3D versions.

Sources

IMAX promotional stills (For reference and rotoscoping)
IMAX promotional videos (For reference and rotoscoping)
UHD Blu-ray
3D Blu-ray

Here’s the plan/process that I will do…

Prep each source to be edited (also will rip the main menu video track from the UHD since it is in full screen and it is montaged clips, use only the stereo audio mix (for editing purposes only) I will preserve the Atmos track, get the MKV files into editable codecs/containers, possibly split it out scene by scene, get the 3D version into full top and bottom 3D)
Edit (gonna take a long long time)
Deliver file (Will be stuck to 10-bit)
Rip the UHD disc folder structure, and remux to m2ts so the edit can be deployed to the UHD disc maintaining menus and features. (This one might take a bit, I’ll have to test it by buying the right sized discs, and then test it still, hopefully it works on a 100GB BDXL)

Here’s the task list…

Load the 3D source in as the base video track
Place markers in the 3D source where aspect ratio changes
Place markers for each camera cut
Crop the Top/Bottom 3D source to the side that best matches the 4K source. (I will also need to take note of the parallax cropping, which is where a movie that is post-converted to 3D needs to remove some of the image to eliminate depth distortion and helps the faux footage gain some depth (both sides will have this)) I will have to horizontally crop the footage to conform it to 1.90:1. If the difference isn’t too much between the two sides on the edges, then I might be able to make a full (uncropped) 1.90:1 frame out of some of the shots
Line up the 4K source into the new frame formed from the 3D source.
Hide the 3D source at 2.39:1 footage and recenter 4K source if need be
Color match the 3D source to the 4K source
Sharpen 3D source if need be to attempt to get it in line with the pixel density of the 4K source

What I’ll be using…

A crap load of hard drive space lol
Davinci Resolve 14 (Free, 15 is being unveiled at NAB this weekend!): This will be used to crop the clips, and initial alignment will be done here.
Premiere Pro: This will be used to color grade (since I don’t have the $300 Resolve license), I will export a Premiere Pro XML of my Resolve project
After effects: If I need to rotoscope or anything like that I’ll probably do it in AE.

Issues that will probably happen…

Can’t deliver in Dolby Vision obviously
The pixel density of the 3D source might cause inconsistency when lining up with the 4K source
It’s gonna take a long time to render each scene
The only HDR display I have is a 55inch TV
SDR to HDR conversion and color grading will be a long process as well, have to make sure it’s right, and will have to be done on my TV in order to see if it looks right.
Premiere Pro sucks
All my encoding from Resolve will have to either be DNxHDR 444 or Premiere Pro XML because the free version of Resolve only does H.264 for MP4 containers. My encoding from Premiere can be a Main 10 10-bit H.265 file.
I’m moving to a new city this month and starting a new job
I still need to finish my Despecialized Edition boxset
My wife will inevitably want me to do shit other than work on this.