According to the report from Geek.com, the directors, Joe and Anthony Russo, were considering shooting two separate endings for the film, one of which would involve Captain America dying. Granted, this one makes some deal of sense, only because the comic that inspired this tale saw Steve Rogers being assassinated shortly after it concluded. But for a franchise as hugely expansive as the MCU, it’d be an extraordinarily gutsy decision to end things on these terms. The Russos revealed in a QA, however, that this much-hyped ending was not only something they didn’t shoot; it was barely even considered.
Article source: https://www.cinemablend.com/news/2478169/8-marvel-rumors-that-turned-out-to-be-completely-wrong