Star of Ant-Man, Sebastian Stan has given teasers on what he thinks the post-credits from Ant-Man could mean.
The footage the end of the credits shows Captain America and Falcon discover Ant-Man.
“I think [what Bucky was caught in was] more of a vice, but it would never happen at his own hand, by his own doing. In terms of that scene in Ant-Man, I’ve seen some of the ideas people have about it, and I would just say that whatever you’re seeing on the surface, it’s not as obvious as that. There might be a whole lot more to the scene. I would say someone would probably want to put him in a vice.” (BuzzFeed)