The Civil War teams that were revealed about a week ago could give us incite into the rivalries we can expect to see between each member. I just wanted to take wild guesses at who might fight whom. These are fights that will make this movie memorable, because what I think may happen is that each team will eventually face off against each other. So here goes...
Captain America vs. Iron Man
Of course these two are gonna be at it. The plot itself said Captain and Iron Man aren't gonna be seeing eye to eye on these "Sokovia Accords," which may be the Superhero Registration Act.
Scarlet Witch vs. Vision
I know what you're thinking: These two get married! They are lovers. In the comic books, yes; in the MCU, not just yet. They're both teammates as New Avengers. It would just be cool to see them duke it before Vision takes her away and asks "Do you wanna see my hard-drive?"
Black Widow vs. Winter Soldier
This fight would actually be unstoppable. Both Natasha and Bucky are badass. I liked that 20 second fight they had in Captain America: Winter Soldier. Since Natasha is supposedly the double agent, is it possible for those two to have a romance? I saw on a game that Black Widow has some sort of romance with Bucky. Why not show an example? (Which has a 5% chance of happening.)
Falcon vs. War Machine
I'm only saying this could happen because they are the best buds of both Cap and Iron Man. If those two Avengers duke it out, Falcon and War Machine would do the same. It would just be a good fight. If I were a director or screenwriter, I would love to make this happen to make fans excited.
Hawkeye vs. Black Panther
This is very likely since it was confirmed that Hawkeye and Black Panther will have some sort of rivalry. So who knows, we might just see them go at it before Hawkeye gives T'Challa his bowl of milk. This fight would just happen because they are rivals. Black Panther is really neutral and will probably be doing his own thing.
Spider-Man vs. Ant-Man
Wouldn't this be a hilarious fight? Even though it'll become unfair once Ant-Man grows 30 feet tall, Spider-Man could figure it out. But these guys are really friends, and sometimes teammates. Wouldn't Ant-Man try to get Spider-Man's mind right about who's side he's joining? He would say that he's a kid and that he shouldn't give himself to the government because he's a superhero. He's better off solo. Will Scott cause Peter to switch sides, similar to what he did in the comics?
Extras: (Some that aren't likely to happen)
Hulk vs. Red Hulk
Plenty of reasons why this is very unlikely to happen in the movie, even though we would very much like to see this. General Ross is in the movie, played by William Hurt, but I highly doubt he'll suit up. People are also saying that Hulk is seemingly confirmed for Civil War. But we don't know if he is or not. If he is, there's no one else that would try to fight him but Red Hulk himself. Everyone else doesn't stand a chance! Not even Vision!
Iron Spider/Spider-Man vs. Captain America
Can anyone else see Iron Man bribe Parker into trying to take down Cap and giving him the Iron Spider suit? I can. I never read the 'Civil War' comic, but I think before Spider-Man switched sides, he got into a little scuffle with Cap. But again, if I were the screenwriter, I would have Cap convince Spidey to join him instead of Stark. That's almost certain. In my opinion, that would be the most amazing fight in the MCU. All because it would be the first time Spidey fought another superhero, instead of a villain. It would be a funny thing to see, especially in a movie like this. Spider-Man is expected to get his hands dirty in the film. Do you think he'll get into it with Cap, and then Stark? Which reminds me...
Spider-Man vs. Iron Man
I'm almost certain Spider-Man will betray Stark. His teenage mind could get manipulated by Cap like in the comics. Maybe a little differently though. Who knows? Maybe THIS is the fight that will excite the entire fandom.
What do you guys think? Just to let you know, these are all theories that I would like to see on screen. But lemme know what you think in the comments! Try to add on this my theories or remove some.