There is a very strong possibility that Bucky Barnes will appear in the Black Panther movie.
Sebastian Stan who plays the brain washed killer turned redeemed hero has a nine film contract with Marvel. We are going to be seeing plenty more of Captain America’s best friend in future films. At the end of Civil War he was put on ice in Wakanda. There’s no doubt that T’Challa will face a dangerous foe in the future like Man-Ape, White Wolf or Erik Killmonger. When he goes to his freezer it won’t be ice cream he’ll be taking out. He is bound to de-frost The Winter Soldier to aid him in his hour of need!
It would make sense to have Bucky revived and made better by Wakandan technology. This Black Panther film is important on many levels as it will be the first comic book film to feature a black superhero in the lead role since Blade Trinity. The last thing Marvel needs to do is have loads of Avengers running around and taking the limelight away from Black Panther. This is a character that deserves his first solo film and it’s been a long time coming. Having Bucky tagging along keeps that small Avengers connection but it will also be an excellent opportunity to develop his character more. The Wakandan people are a proud and spiritual people and there’s a lot of positivity that can pass onto Bucky and help bring him back to his former self.
And as far the future of The Winter Soldier, he may one day find himself picking up that famous round Vibranium shield and donning the red, white and blue.