Near the start of the recently released Age of Ultron tailer is a wide-angle shot of what I assume is one of Stark's labs, with all of the Avengers in it plus three other people. One of them is Col. Rhodes, but who are the other two people supposed to be? They appear to be somehow connected to Thor and Steve Rogers, but otherwise I'm completely unsure.
Left to right, it seems to be Banner, Romanov, ??, Thor, Rogers, ??, Rhodes, Stark, Barton.
Update: Here is another angle as provided by the new footage after Agents of S.H.I.E.L.D.