Black Panther is a fine film, but if they were going to nominate a MCU film, it should have been Infinity War, which I think blows Black Panther out of the water. But I think BP deserves some kind of award for FX or something.
The only MCU film I would even dare say that about is Captain America: The Winter Soldier, but even that film is not up to Best Picture level.
I think Civil War beats Winter Soldier. Infinity War beats both, to me, anyway.
Debatable if any of them deserve best picture, but I was just saying if an MCU film were to be nominated from 2018, it should have been Infinity War.