User blog comment:Larry1996/What if ''Iron Man 4'' is the last one?/@comment-13192996-20140108235328

RDJ is signed for two Avengers films nothing else, and despite the similarities between Dr. Strange and Ironman he will not be his replacement however I think the studio are giving Ironman a rest on the solo movie front. When its time for the next solo Ironman it won't be untill well after Avengers 3 also RDJ won't be returning as he himself stated he will not return for any more solo films due to the strain from the intense schedule's. As for the real Mandarin we shall have to wait and see the marvel one shot to see what it actually entails.