Okay, after further reading at tehparadox, there is no GOTG 2D un-tinted version. (Unless you download KK650's regrade, which btw I think is really good)

There is however this option for owners of the 3D BD:

" The way 3D BD versions work now is that they are all 2D m2ts files with an extra folder for 3D info that the Blu-ray player will utilize when the 3D mode has been selected/activated. However on the 3D BD the 2D m2ts file comes with the two different aspect ratios. So all you have to really do is turn that file and only that file into an mkv file and you should have your GOTG 2D IMAX BDRX. My 2D IMAX remux came to over 28 gigs btw and looks fantastic! " (And it will look like the 3D picture above)