BD25 or BD50? I think you may find yourself surprised at just how many changes there are between 1997 and 2004. A BD50 could fit the 97 separately, and a branching 04/11.

If you did try to do seamless branching between all 3, I think it would be a shame to use '97 as a base and reduce the quality of everything else. If you try to pull this off 2011 as a starting point would make the most sense.

For a quick and decent color correction, the user "age" uploaded some great LUTs that get the Blurays into much better shape. Not enough to fix the magenta laser illuminations and some other problems, though.