There are at least 25 possible characters’ to consider for inclusion in this film. It would be a chore to read an article that large. Therefore I decided to break it into 3 parts.
Current Avengers - New Allies/Wildcards - Government/TV
First a quick explanation how I’m forming my opinions. I am a Marvel Unlimited Member. So before I wrote this editorial I reread anything available pertaining to Civil War. Just to give me a solid foundation of the event. I also view this movie as the MCU interpretation of Civil War. Keeping that in mind some of these characters’ motivations may differ from their comic book versions. Therefore I’m basing my choices on how they have been portrayed on screen up to this point. And taking into account who may be missing due to MCU not have certain rights. So lets go.
I’m assuming you’ve seen AoU
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Part 1
The Avengers

This includes everyone who stood with Cap at the end of AoU, plus Hawkeye. I originally had Hawkeye somewhere else. But recent set photos show him with the team on the Atlanta/ Africa set. So I consider him very much unretired.
Falcon: Sam makes it clear in TWS that he goes where Cap goes. Falcon respects Steve and they share that bond men who have been in combat share. It’s a no brainer Falcon will be by Caps side until the end.
Opinion: 100% on Captains side.
War Machine: War Machine will be on Iron Mans side, but it’s not the same as Falcon’s loyalty to Cap. Coronal Rhodes is Tony’s close friend, but first and for most he is a soldier and soldiers follow orders. Multiple times in Iron Man 2 Rodney was willing to fight Tony when Iron Man chose to go against the military. This is how I see it. War Machine is more pro-registration than pro-Iron Man.
Opinion: 100% on Iron Man’s side.
The Scarlet Witch: She’s new to the team but comes with a ton of life changing experiences. Her family was killed by devices created by Stark Industry. She was experimented on by Hydra. Then used by Ultron in a way that ultimately lead to her brother’s death. Wanda has chosen to play nice with the Avengers but this girl is bound to have trust issues. In AoU Wanda peered into both Tony and Caps mind. She understands how both men think maybe better than they do themselves. Only the Vision siding with Tony could make her choose Ironman’s cause. So in the end allowing the government or shield to oversee the lives of enhanced beings? Not a chance.
Opinion: 95% with Captain America 5% Iron Man.
The Vision: Prior to viewing AoU I could have seen Vision being 100% with Tony. I mean he was Jarvis after all. Then I saw the movie and learned that Thor was the Avenger who shared a relationship with Vision not Iron Man. The Vision is no longer Jarvis and that loyal connection with Tony is gone. They both still share analytical thought though. So depending on what the government’s plan is. The Vision may view it as what’s best for mankind. I still think his compassionate side will lead to a strong connection with Wanda. Ultimately she will keep him with Cap. I’m going 75/25 because I don’t see them splitting up Scarlett Witch and Vision.
Opinion: 75% Captain America, 25% Iron Man.
Black Widow: As one of the non-powered members of the Avengers Nat knows the destruction her super teammates can create. This will ultimately have a bearing on her choice. Black Widow is going to leave Cap and join Iron Man. Her relationship with Steve will make this defection a dramatic moment in the story. I also think it’s a numbers game and Iron Man needs another Avenger on his team. Plus maybe just maybe a certain Big Guy returns and reforms the Science Bros. I’m not all in with team Iron Man though because of the Fury angle. He’s the one person she seems to be completely loyal to. Maybe she’s a mole?
Opinion: 90% Iron Man 10% Captain America
Hawkeye: The most complex character in my entire article parts 1 through 3. I have changed my position on Barton more times than I can count. The introduction of his family is huge. In the novelization of Civil War Peter Parker plays an important role. He represents the importance of secret identity. When his identity is exposed his family is put in danger. Now Peter is a Child in this movie. So this role won’t be his to play. Hawkeye and another character I discuss later are the logical choices to carry this plot point in MCU’s Civil War. What happens to the Barton family will define Clint’s role. Tony’s actions possibly expose them to a danger like Crossbones, or maybe Winter Soldier uses them as a tactical advantage against Cap. We’ve also heard a rumor he fights Black Panther. Could this fight end badly and sideline him all together. Hawkeye may even make a preemptive strike and take himself out of the conflict all together, thus choosing to stay home to protect his family.
Opinion: I’m going 45% Cap 45% Ironman and 10% neutral.
Well that’s it for part one. Hope you enjoyed it. This is my first effort to contribute here on the site. Constructive criticism is welcomed. I love CBM’s and quality debate about them.
Part 2 New Allies/Wildcards
Coming Soon