I think it may take two different approaches to do the two edits depending on whether I want quality or authenticity.
The “alpha waves/pasta fazoli” shot seems to be different in all three cuts (the OTV lacks the “pasta fazoli” part, which both the RIC and RDC have, but the RIC and RDC are obviously different takes, as marked by Otis’s slightly different reaction to the mention of alpha waves). Most likely for an authentic cut I’d need to use the RIC footage, but for a high quality cut, the RDC would be a better choice.
Definitely, there are shots that have equivalent footage that could stand in for what is missing. Some alternate angles work fine as is, some would have to be retimed to make them fit the pacing of different line readings. Then there is other stuff that’s only in the RIC that would require that source.
I think there are some shots that could be made into widescreen using an existing shot and doing head/ body replacement with RIC footage. For example Superman’s line “Somehow I just can’t hear you Zod” could be made using shot from “I’m not a coward Zod”, and replacing his head with RIC footage. Similarly, Zod’s "It is extremely likely you are merely a fool, like father, like son”, could be created using the background from the shot where Zod looks up to and uses his heat vision.
The 2 versions I’m thinking of right now are:
Complete purist: Using blurays for available footage, upscaled RIC for the rest. 4:3 presentation.
Best quality: Using blurays for all footage, some shots alternate takes or angles, some shots created from combination of RIC and bluray. Shots that can’t be created due to zero available footage, like the Concorde scene, are cut. 16x9 presentation