Captain America: Civil War Writers Never Considered Killing [SPOILER]
They didn't want to "lessen the gravity" of the film...
Regardless of how many so-called "experts" claimed that Marvel adapting Civil War meant that Captain America would DEFINITELY die at the end of the movie, he was never going to be assassinated. Chris Evans still has an ongoing contract with Marvel, and given the studio's willingness to pay Robert Downey Jr massive money to continue, there's no way they would have surrendered one of their biggest brands without a fight.
The Civil War writers, Christopher Markus and Stephen McFeely, have now confirmed to Yahoo that they were never going to follow the source material's fatal final act for Cap either:
We never really went into this with the intention of killing Cap. One, because he doesnt really die, so we werent going to do the time bullet . And there are other movies coming, and its like, 'Are you gonna kill him? And you get crap for fake-killing people. We fake-killed Fury and it worked pretty well, but At a certain point youre lessening the gravity of the movie when you kill somebody, because people are like, 'Oh now were in comic-book world because hes gonna come back. So you get more gravity out really hurting somebody. Someone like, say, War Machine."
That's not forgetting that The Avengers also fake-killed Agent Coulson and Captain America basically fake-killed Bucky. There's also been a number of near-miss fake-outs - like Iron Man's heroic save at the end of The Avengers - and the writers are correct in saying it loses impact every time it's used.
The writers also revealed that they wrestled with the idea of removing the name Zemo from Danel Bruhl's villain, that they were charged with writing two versions of Civil War (in case the Spider-Man deal didn't go through), and that we almost didn't get to see Black Panther at all in the movie. T'Challa would have appeared, but not in his immediately iconic super suit.
You can read more of the Civil War writers' revelations here.