Latino Review were reporting that Peggy Carter played by the incredible Hayley Atwell would be making an appearance in Marvels upcoming "Ant-Man", seems like that rumour has been confirmed with Project Casting putting out a casting call that reads like this;
Casting directors are looking for an actor to work as a
stand-in for the actor Haley Atwell. Haley Attwell is 31, 5’7 and 112
pounds. She is best known for her work in stage productions such as A
View from the Bridge, and in films such as Cassandra’s Dream, The
Duchess, The Pillars of the Earth, and Captain America: The First
Avenger. In addition, casting directors are looking for a body double
that meets certain requirements.