The most popular of these is Anthony Mackie’s Falcon, who made his debut in Captain America: The Winter Soldier before becoming an Avenger and even slipping in an awesome scene during Ant-Man.
Chris Evans possibly leaving the role of Captain America seems to make room for a new hero to rise and take the mantle.
Falcon certainly feels like Cap’s protegee in a way, and is another armed service member who could take on the mantle.
And there have already been quite a few popular fan theories as to who will be passed the iconic shield after Steve.