Originally Posted by crounsa810
I think the connection was hinted at in Avengers. When Hawkeye is saying to her "Do you know what it's like to have someone else in your brain, picking at it?" and she says "You know that I do"
That strikes me as vaguely similar to Winter Soldier.
Sounds similar to how BW and WS have described as the Russian way of programming their operatives in the comics. I have a feeling we may see or hear how the Russians do it in the movie.