I don't remember it looking that green in theaters. I know that 3D glasses can have a slight yellow-green tint, but I saw it in 2D. It didn't look that obviously green-tinted (though I'm also not sure if it was as neutral as the regrading).

That said, I have seen a few instances where the home version seems to look darker/duller/have a more pronounced tint than the theatrical DCP. Jurassic Park 3D comes to mind, it looked beautifully bright (especially with glasses off) but the Blu-ray screenshots I've seen look dim and drab.

And I also don't remember noticing FOTR:EE's green tint in the 2011 Fathom screening. I was aware of the color timing changes, but not a blanket green tint. Doesn't mean it wasn't there. It could be due to how our eyes self-adjust white balance with no other reference, but I'm not sure.