So, it may be all the Region 2 2D discs then.Harmy said:
So, I just bought the Czech BD 3D set and can confirm, that the 2D disc has the tint too :-(
Luckily, I watch most of my BDs through my computer, so I can watch the 3D disc in 2D or adjust the colors of the 2D BD on the run.
Here are the discs from the US Best Buy exclusive Steelbook:

2D

3D
It's really hard to tell with these TV shots....
Wait, you can watch the 3D disc in 2D on your computer? I must try this. (I don't own GotG yet because I haven't been to Best Buy yet)