I think it's foreshadowing Bucky to be the new Captain America at some point in the MCU. After all, this movie will be preparing him for just that.
It's promising, though. Of course, it's still in works. Who do you think will be perfect for the role of Dr. Strange? I think it will have to be someone that looks similar to him like with Tony Stark/RDJ, Wolverine/Hugh Jackman, Nick Fury/ Samuel Jackson.