In one of the interviews, the actor asked for a candidate for the role of the next captain of America. Frank Grillo stated that he had no reliable information on this matter, but a certain rumors reached it. "Captain America can be African American. Or it may be a woman. They are still looking for a candidate, "the actor said.
Grillo Interview on Show Larry King:
What will be the final MARVEL solution, you can only assume. The black captain America can become Anthony Macs, the executor of Sam Wilson's role - partner Steve. In comics it was he who took the star-striped shield and the title of captain after Baku Barnes. The prospect of the fact that Sebastian Stan will be replaced by Rogers, doubtful: his scenes in the Vacante in the Black Panther and the "Incontinacy War" hint that the white wolf will take place in the film of the Barnes.
For Marvel, it is also not a novelty to change the male character female, as it happened in the comics about the Torah. When he was unnecessary hammer, Mielnir instead of him raised Jane Foster, becoming a woman-torus. At the moment, only Sharon Carter, the beloved Steve Rogers can be the only contender for the role of the new captain. But after the third solo film about Captain, America Carter did not appear anywhere else, and her romantic line with Rogers did not receive development.
There is another option that most fans could arrange - not to look for Evans replacement. Regardless of the finals of the Avengers 4, the studio has many new characters whose stories need to be told. If Captain America dies, his shield is worth leaving untouched, and if surviving - Evans can always be invited to small chambers.