First of all, even if Marvel manages to pull at least 7 to 10 new heroes in all the films and TV shows of Phase 3 (chances of this are slim at best) there will still not be enough characters in the MCU for the storyline to make any sense. Hell even if those crazy ass Spider-Man rumors are true there will still not be enough characters to make heads and tails of this story. Civil War’s cast is HUGE and composed of heroes and villains that doesn’t a prayer of making their debut in the MCU yet. But don’t take my word for it. Among all the crazy internet fanfare you can find the voice of reason in brothers Joe and Anthony Russo, the directors of Captain America The Winter Soldier and the upcoming Captain America 3 who spoke about the subject with Cinemablend:
"It’s complex. There are a lot of characters. Marvel doesn’t have ownership of some of the key players in that. […] I don’t run Marvel, so I can’t say that it won’t happen, but I would say that it is highly unlikely."
(Read the whole piece here)
I will also share with you a very nice analisis by the fold of IdigitalTimes explaining why Civil War it’s not coming any time soon:
Marvel’s Civil War will not be the premise to “Captain America 3,” sorry fans but it’s just not going to happen. Now, there is plenty of reasons as why this is, but the most obvious is that there are just too many characters involved in Marvel Comics’ groundbreaking storyline that pitted hero against hero.
Despite what any leaked Marvel Studios movie list may say, A Civil War film won’t be happening anytime soon. So let’s gather the facts and shoot down all the “Cap 3” will be a Civil War story speculation for good.
First off, the speculation pretty much stemmed from an interview Joe and Anthony Russo, the writers and co-directors of “The Winter Soldier” had with Crave Online when they were asked about what “Captain America 3” would be about.
The brothers told Crave Online the following about the plot and how Kevin Feige fits into the whole thing:
“If you’ve been talking to Kevin [Feige, President of Marvel Studios] the title has been in place probably for ten years in his brain. It’s all part of the road map that he’s laid out, and it’s all part of the bigger plan.”
Immediately the forums and blogs were scrambling to figure out what the story could be. And Civil War happened to be the one common thread between them. However, the Civil War storyline began in July of 2006. That’s only eight years from when “Cap 3” was announced, so the idea couldn’t possibly be in Feige’s mind for 10 years because the story wasn’t published yet.
Of course, “Cap 3” will release in 2016 almost 10 years exactly from when Civil War swept through the Marvel Universe. And the Russos do say ‘probably’ so it’s just an estimation and Marvel Comics had the seeds laid out for the Civil War storyline well in advance.
But with Feige not coming aboard the Marvel train till 2007 it’s a little hard to believe that he wanted to make a Civil War film just as the event was happening in the comics.
Besides, the Russos told Cinema Blend that a Civil War story in their film is pretty much not happening.
“It’s complex. There are a lot of characters. Marvel doesn’t have ownership of some of the key players in that. […] I don’t run Marvel, so I can’t say that it won’t happen, but I would say that it is highly unlikely.”
The one main ‘key player’ they speak of is “Spider-Man” (whose rights are owned by Sony) who famously revealed his identity to the world in cooperation with”Iron Man’s Pro-Registration side. Unless they make some kind of box office-breaking deal with Sony, Marvel Studios won’t have Spidey in their movies anytime soon.
So what will the subtitle to ‘Captain America 3’ be? It’s a little hard to say, Cap hasn’t really been involved in many iconic storylines through the years. And with the Russos saying that Cap 3 will change the MCU similar to the fall of S.H.I.E.L.D. in ‘The Winter Soldier’, it really narrows down the stories that you can adapt from.
Joe Russo said “there is a very, very big idea” at the center of “Cap 3” that doesn’t necessarily dictate who the main villain and featured cast members are (“all that stuff is open for interpretation”) but that “alters the universe as a whole in some way, that has interconnectedness that he’s grabbed on to.”
After ‘Avengers: Age of Ultron’ the MCU will have the Scarlet Witch, Quicksilver and Vision joining the good guys — that is if they die in this film, which is highly unlikely. (Source)
So chill the fuck out with this already Internet.