Amanda Righetti Confirmed As SHIELD Agent, Is It Sharon Carter?

One of the Captain America scenes that went over my head during the end was the appearance of actress Amanda Righetti (Friday The 13th, Mentalist, Role Models) as a SHIELD agent. This likely means that Amanda is playing Sharon Carter in Avengers considering her stunning resemblance to Hayley Atwell's Peggy Carter. It would also make sense considering Sharon could explain what happened to Peggy along with developing a relationship that would flow into Cap 2. The other possible SHIELD agents include Carol Danvers (Ms. Marvel) and Contessa Valentina Allegra de la Fontaine.