Era provavelmente Kevin Feige, algum tempo antes deles terminarem de atirar Vingadores .
Em uma entrevista com / Film , Kevin Feige (presidente da Marvel Studios) foi fez esta pergunta muito diretamente. Como a Feige fica perto do topo da cadeia alimentar da produção da Marvel, é provável que ele tenha tomado a decisão de seguir com essa ideia.
Parece que esta é uma ideia flutuando quando eles estavam fazendo o Primeiro Vingador , e ele foi bloqueado logo depois que eles terminaram de atirar Vingadores . Aqui está sua resposta completa:
So you spent eight movies and a TV show building up S.H.I.E.L.D. and then in this movie, you say good-bye to S.H.I.E.L.D. When did you get that idea to sort of have HYDRA be underneath it all?
Well it was sort of a notion I had in the back of my head during Captain America 1 when we were sort of plotting the timelines for Cap and Avengers. The S.S.R. and Howard Stark’s involvement and, you know, people always ask, do you have master timelines of all the different movies? And we don’t really, but we do have timelines of the details of some of the movies, like the Stark family and things like that. And we were putting that together. And I started to get excited again, just sort of in the back of my own head about the idea that the S.S.R. help defeat the Nazis obviously, but also HYDRA. And that would make sense that the United States truly did bring in some of those HYDRA scientists and experts in technology to incorporate it and that much of what became S.H.I.E.L.D. signature items were a part of the HYDRA Corps brand. And what if you took that to another level and said “Oh, they’ve been in there the whole time, they’ve been growing in there the whole time.” And at some point reveal that much of the work S.H.I.E.L.D. had done was all for this, for the purpose of eventually bringing back HYDRA.
And I think the first person I actually sort of verbalized it to was Chris Evans. On the last day of shooting we were in Central Park on Avengers and he goes “So what are we doing for the next one?” I said, “Well, you know, we love Brubaker’s Winter Soldier, we think there could be something there. And have Sebastian [Stan] become a totally different version of himself. We also have this notion about SHIELD.” He was like “Holy crap, what the…?” And just based on his reaction it was like, “Oh maybe this is good.”
Como a ideia não foi decidida quando eles estavam fazendo o Primeiro Vingador , provavelmente não foram tomadas decisões explícitas que prenunciaram a revelação da HYDRA. Eles podem ter tomado decisões que tornariam tal enredo mais fácil de justificar mais tarde (ou pelo menos não descartá-lo), mas não diretamente a ele.