You guys, calm down! They're more than likely not making a Civil War movie. At least not in the way you think. During the end of CA:TWS, it is established that Cap and the Falcon are off to find Bucky. The last time we see Bucky is at the Cap exhibit, finding out who he is. So what does this have to do with Iron Man? Remember in the scene at the old SHIELD base? Zola was expositing to Cap and Black Widow about SHIELD being over run by HYDRA from the start. And how anyone who got in their way was dealt with. BW says that can't be true, SHIELD would have known. To which, Zola says "Accidents will happen." Then the screen cuts to: a pic of the Winter Soldier then a pic of Howard Stark's obituary. Leading one to assume the Winter Soldier killed Tony's parents. More than likely CA3 will be about Tony finding out that info and the fact that Steve kinda knew this and didn't tell him. Problem solved. You gotta follow the movie canon not the comic books. Besides, everybody is going crazy over something that isn't even possible for the MCU to do. Not to mention, the Russos already said they weren't doing that story, that they were going to finish the WS plot.