https://www.facebook.com/MarvelLatinoamerica/videos/927976081362298
The official Marvel Latam account a few days ago uploaded this video revealing some information about Bucky/Winter Soldier. I speak Spanish so my translation may not be very good, but here is the new:
-It's confirmed that Shuri managed to erase Bucky's mental coding installed by Hydra (I don't know if it had already been confirmed before).
-Bucky's new cybernetic arm (vibranium) also has an electromagnetic pulse and holographic camouflage.
I hope Marvel will upload more information about other characters.