Eles tinham planos antes do filme ser lançado, mas não receberam a luz verde até que o Item 47 veio com o release de mídia The Avengers .
Disney CEO Bob Iger greenlit a television series based on S.H.I.E.L.D. at ABC after watching Item 47. - Wikipedia
Mas um programa de TV com Coulson foi discutido antes do filme:
“We all love Clark Gregg, there’s no doubt about that,” Whedon said. “From before we made ‘The Avengers,’ we discussed whether there was a way for him to be a part of the Marvel Universe, perhaps a part of a TV show even after his death. … The fact of the matter is, as much as we love him, now that I’m really running Marvel, I like to keep a type of artistic integrity, which means we don’t stretch the bounds of reality.”
“There was never going to be a ‘S.H.I.E.L.D.’ show without Agent Phil Coulson!” said Feige - CBR
Então eles não sabiam se o show viria ou não quando eles filmaram Os Vingadores , mas eles queriam ter Coulson desde o início e é por isso que eles o reviveram para o show.