I am aware of the different aspect ratios. I am correcting TDK shots and using them as reference for framing. Then I align the BB shot with the Blu-Ray and feather out the edges for where the BB disk has been cropped. The result is the same framing of TDK Blu-Ray, but the colors and dynamic range are mostly from the BB disk. Notice the greens and yellows in the shot especially.
Dark Knight Color Matched
Dark Knight with BB Composited on top
Note that this technique will also be used for the Full IMAX shots, I plan to release a version for both aspect ratios. Right now I’m tackling 16:9 as that is the most accessible since most have 16:9 monitors and sets. It won’t be long after that the full IMAX scenes will be ready.