-With Captain America: The Winter Soldier being a "political thriller", Civil War will be more of a "psychological thriller"
-For Civil War they are currently in the process of "locking the picture" the story and the edit will be set and then they will move on to adding all the visual effects
-The whole 67 characters in Infinity War was nothing more than a hyperbole the directors joked about but people took it as literal and ran with it (there are still a lot of characters in the movie, obviously).
-Filming for Infinity War starts November in Atlanta including unnamed locations in different parts of the world. During production they will mix the two movies together with them filming a scene for the first movie one day and then the second movie the next day.
hopefully this means we will get a casting announcement for Captain Marvel this year.