I know RDJ says he won't return for another Iron Man movie but he will be in both Avengers 2 and 3. I think the possibility of an Iron Man 4 could happen in 2017 or 2018. So what are some possible storylines that could happen? Maybe Tony finally proposses to Pepper, maybe Tony looks into the death of his parents and finds that Roxxon is responsible for their death, and maybe Roxxon wants to take over Wakanda for their precious Vibranium, maybe we could see the Black Panther! BLACK PANTHER!!! we need to see this hero joinning the Avengers. Give me your ideas on what you think!