Regarding whether the 70mm composite of TIC contained the entire three panels (which combined are wider then 70mm's native 2.20:
Greg Kimbal's article certainly hints at the possibility that the 70mm composite TIC print could have had an anamorphic squeeze which could then contain the full width of all three panels. How much of that actually ended up on the screen when projected is another story. I don't have answers to either but when TIC comes out on video doubtless Someone will explain that, or it will be fairly obvious, since they reportedly won't be blending the join lines as much as WB did on HTWWW. My guess is someone will come forward with that detail sooner than later.
Greg Kimbal's article certainly hints at the possibility that the 70mm composite TIC print could have had an anamorphic squeeze which could then contain the full width of all three panels. How much of that actually ended up on the screen when projected is another story. I don't have answers to either but when TIC comes out on video doubtless Someone will explain that, or it will be fairly obvious, since they reportedly won't be blending the join lines as much as WB did on HTWWW. My guess is someone will come forward with that detail sooner than later.