It's no secret that the Marvel Cinematic Universe is a pretty giant place. With almost a decade full of films in its impressive history, there are a vast pool of characters to play with. The Russo Brothers will be doing just that with Infinity War and Avengers 4, as they unite the majority of the shared universe's biggest characters in an epic battle against Thanos and his forces. But not every MCU figure made it into the film, and it's increasingly looking like Emily VanCamp's Sharon Carter won't be popping up in the rest of Phase Three. She recently explained the reasoning behind this, saying:
I mean listen, it's hard to fit Sharon into that. She's really in Cap's world, you know what I mean? So, I mean, I can't say anything about anything, but I will say that you know she sort of fits into the Captain America movies, that's where her sort of story lies.
It looks like Emily VanCamp seems to understand that Agent 13 is firmly rooted in the Captain America franchise. While Steve Rogers is sure to be one of the leading characters in the next two ensemble movies, working in his love interest into the narrative wasn't necessarily a priority.
Emily VanCamp's comments to Build is sure to be a bit disappointing to Marvel fans. Sharon Carter has been a fairly significant character in both Winter Soldier and Civil War, making her seem like a fine candidate to show up in the upcoming battle against Thanos. But then again, the Russo Brothers have always kept Sharon separate from the rest of the heroes. While she got to have a role in Civil War, she didn't get to participate in the epic airport battle scene in the film's third act.
Then again, Civil War in particular seemed to set up Sharon Carter as a more significant character in the epic shared universe. Her growing attraction toward Steve Rogers reached a boiling point, and she ultimately decided to go behind the government's back to help out Team Cap. The two also shared a brief kiss, presumably setting up a more concrete love story between Cap and Peggy Carter's niece. While the plo tline was kind of incest-y it seems odd that The Russos would spend two movies setting her up, and then drop the character during the universe's big finale.
Of course, it's completely possible that Emily VanCamp is seemingly fibbing, in order to let Sharon Carter's inclusion in Infinity War or Avengers 4 be a surprise. Marvel actors are kept to strict contracts regarding what they can and can't divulge, so Sharon might end up showing up in the end. Presumably all it would take was a day of shooting to have the character react to the apocalyptic events happening.