According to Latino Review Avengers Age Of Ultron might be seeing Ms. Marvel in this Avengers sequel.
According to the source, the final bit of casting news will indeed be that of Carol Danvers, aka Ms. Marvel.
Miss Marvel is the last piece of major casting left in the movie… I’m not going to spoil HOW she is in it, but she is in there kids. The question now is who is going to play her? Katee Sackhoff was originally rumored so it will be interesting to see who Marvel gets for that part.