According to ComicBook.com on Saturday, directors Anthony and Joe Russo of "Captain America 3" had seemingly gave awareness to the likelihood of their film sequel to have a similar tone to that of "Captain America: The Winter Soldier." It does seem surprising considering considering Marvel Studios have been known to produce thematic films per each project.
"Captain America: The Winter Soldier" ran more along the lines of "The Bourne Identity", while "Guardians of the Galaxy" was more heist related. "Iron Man 3" indeed had a different theme to its previous predecessors. That all being said, it does make sense to make the move of taking the character to places he's likely meant to go.
It was mentioned by Joe Russo that a considerable time had passed from the World War II era towards the present. Considering this, it would just seem in all likelihood to address what is currently going on in the world of terrorism and sleeper cell situations. Hydra was such a sleeper cell and it was refreshing to see Steve Rogers to figure it potential treachery from within the S.H.I.E.L.D. organization.
"The difference between First Avenger and Winter Soldier is that seventy years had elapsed between the two movies. Cap was waking up in a world that was a million miles away from the one he came from. That gave us a narrative motivation to push the he tonal and stylistic content of the world forward. We don’t have that same time elapsed here. It’s the world Cap woke up in still, even though it’s several years later and some other significant events have happened. At the same time, we are pushing Cap to a place he hasn't been before."
Ed Brubaker authorship of a certain story line, whose comic book run entails the reintroduction of Bucky as the Winter Soldier, could be along those lines of speculative thoughts. Also, some persist a theory that would fall along the lines of the "Death of Captain America" story line arc that had stemmed from the Marvel Civil War.
"Captain America" is scheduled to be released in theaters come May 6, 2016.