The white wolf
There’s an interesting post-credits scene in Black Panther where we see Bucky Barnes recovering from injury in Wakanda. He’s being looked after by Shuri and the rest of the Wakandan community, who are aware that terrorists and Hydra agents are looking for him to use his conditioning to their advantage.
Aside from it being pretty amazing that T’Challa is willing to take in the person responsible for his father’s death, the naming of him as “The White Wolf” is a direct nod to the Black Panther comic books, where a character called the White Wolf features as an ally-come-enemy.