MTV’s Kevin P. Sullivan was in the Comic-Con press room and did a quick interview with Hayley Atwell. There, he asked her about her Avengers: Age of Ultron role which she recently announced. She told Kevin that she will not be seen as the present day “Old Peggy” in Avengers 2 - as she was in Captain America: The Winter Soldier. Last we saw of ‘Peggy’ she was in a retirement home suffering with alzheimers.
The role was a last minute addition. Joss and Hayley had gone out for drinks and during a conversation he suggested he write her into the flick and she eagerly accepted. (x)