Captain America: Civil War (2016)
This also makes William Hurt the first actor from "Incredible Hulk" to return in a later MCU film, aside from Robert Downey Jr and Stan Lee, who both had cameos in "Incredible Hulk".
-Iron Man (2008) and sequels - Weaponry and technology.
-The Incredible Hulk (2008) - Mutation and nuclear power.
-Captain America: The First Avenger (2011) and sequels - Experimentation and espionage.
-Thor (2011) and sequels - Mythology and religion.
-Guardians of the Galaxy (2014) - Extraterrestrial life and cosmic beings.
-Ant-Man (2015) - Telepathy and control of animals.
-Doctor Strange (2016) - Magic and witchcraft.
-The Avengers (2012) - Alien Invasion.
-Avengers: Age of Ultron (2015) - Artificial Intelligence.