Why no Iron Man 4???????

Rating: 5/10 (4 August 2013)

This was a good movie, not great but definitely good. The misuse of the Mandarin was a hard one for comic lore lovers to swallow. It was also hard to understand how Pepper became so aggressive in the end . Why was the armor so weak and got destroyed like tin foil during the climax of the movie. Tony was going through suits of armor at the rapid rate during the finale. My question is with the large sum of money made off this film, more than doubling what it cost to make, why have they not green lit another one? I know he is going to be in Avengers 2 but I figured they could start moving forward on Iron Man 4 too. Anyone know why they haven't? Is is because of the price tag that RDJ has demanded for reprising the character? Seems worth it if he can double a figure like $200 million.