It is fully expected that making a huge superhero blockbuster movie is a complicated process with all the digital effects and the green screen tending to be involved, but it turns out sometimes that Reading the script can be just as difficult. Recently, Paul Bettany and Elizabeth Olsen appeared together in a regional question and answer comic interview, and the couple admitted they were both really confused when they first read a Marvel script. In the case of the man behind Vision, the confusion was that he was unfamiliar with the characters before. According to Bettany …
It seems almost funny now, because even people who did not grow up with comic characters like Iron Man or Captain America now know who Tony Stark and Steve Rogers are, but it certainly was one Time in which that was not the case. While Paul Bettany had been part of the Marvel Cinematic Universe from the beginning, he became a tangible character as the voice of Jarvis only in Avengers: Age of Ultron and may have only really begun to pay attention to the larger one MCU at this point. As someone who was not very good at comics as a kid, he knew the names of the heroes, but not necessarily the names of the people who wore the costumes.
However, that's not the only reason why Marvel scripts can be confusing as hell. Elizabeth Olsen reveals at ACE Comic-Con that there's obviously no consistency in these scripts when it comes to naming people. Even within the same script, characters with different names are called, which can also confuse you if you're not sure who everyone is.
Elizabeth Olsen joined the MCU in Avengers: Age of Ultron So there were certainly a lot of characters she needed to keep in mind. If the script kept changing the way it referred, it made sense that things could get confusing. You should take notes with you so you remember which names belong to which hero.
Of course, this problem only gets worse as the number of characters increases, so the scripts for Avengers: Infinity War and Avengers 4 were probably undecipherable in the vicinity. By now they are probably experts on all Marvel character names. Just in time to change everything when the current phase of the MCU comes to an end next year.