So far, I would also have to say Captain America Civil War. Although, the year isn't done yet and there is still the Assassin's Creed movie to look forward to.
The entire Cap and Bucky vs Iron Man had tons of emotional weight to it for example.
Especially when Iron Man was bloodlusted, and the end part where he says you don't deserve that shield as my father made it.
Zemo's entire plot line had emotional weight to it.