From Marvel Studios News:
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Even though Steve Rogers sent “Tony Stank” a message that the former would be there for Stark when needed, too much went down and was revealed in Civil War for everything to just be okay. There are hard feelings and those feelings are not going to be resolved off camera. We will get to see those fences being mended in Avengers: Infinity War, as Anthony Russo, who directed Civil War and will direct Infinity War with his brother, Joe, told The Independent.