Neal McDonough, who played Dum Dugan in Captain America: The First Avenger, briefly commented on returning to that role in Cap 2, as well as a tidbit about the post-Avengers Nick Fury movie.
McDonough says that Captain America 2 will start production at the end of the year, after Thor 2.
Yeah, they’re planning (to go into production for) Captain America 2 for the end of this year, because Marvel does one film at a time. So they’re going to do Thor 2 and as soon as Thor has wrapped, they’ll do Cap 2. Hopefully right after that, we’ll jump into Nick Fury because that’s the one I’m looking forward to more than anything.
He also mentions why he is so excited for the Nick Fury movie.
Because it’ll be me and Sam Jackson. In the real Marvel universe, Dum Dum Dugan is Nick Fury’s right hand man.
--And I just pray that they have a 1970s setting, because I want to see Sam Jackson with lambchops kicking people’s asses for Marvel universe. It would just be awesome. And to work with Sam would be a treat. We’ve become friendly over the years.
While McDonough states that Marvel does just one movie at a time, Doctor Strange is currently being worked on as well. It will be interesting to see how everything fits. From the sound of McDonough, I would guess Strange would begin after Nick Fury; however, I don't think as many details have come out in regards to a Fury movie compared to Doctor Strange.
Guess, we'll see.
(Via IMDB Blog)