For the record, this is what Joss said about the deleted scene in Avengers:
One of the best scenes that I wrote was the beautiful and poignant scene between Steve and Peggy [Carter] that takes place in the present. And I was the one who was like, Guys, we need to lose this. It was killing the rhythm of the thing. And we did have a lot of Cap, because he really was the in for me. I really do feel a sense of loss about what’s happening in our culture, loss of the idea of community, loss of health care and welfare and all sorts of things. I was spending a lot of time having him say it, and then I cut that.