Romance isn’t always a priority in the Marvel Cinematic Universe, though the superhero franchise features some great love stories that play a pivotal role in movies. Although romantic relationships typically serve secondary roles to the captivating battles between heroes and villains,

It began with 2008's "Iron Man," a film that introduced the world to Robert Downey Jr.'s Tony Stark with the hint that he could be part of something greater. Over 30 films later, the story of the Marvel Cinematic Universe is still being told,