That reminds me...
I wonder if Coogler will ever pick up the dangling plotline of T'Chaka's ring. They made a minor point of focusing on it in CIVIL WAR. There was even a brief scene of it reacting strangely to Bucky's arm.
(See about 1:00 in this clip: https://www.youtube.com/watch?v=T4jV1NQuapA )
I don't think that there was any real dangling plotline with it.
The first time we see it, T'Challa is reflecting on his loss. He's got it in his hand because its a family heirloom, and he's just lost his father.
The second time, Bucky isn't looking at the ring itself, but reacting to the fact that T'Challa has him in a perfect arm lock...on the wrong arm