Following the final battle between Steve Rogers and Tony Stark in Captain America: Civil War, Captain America (CA) drops his shield (to the ground), leaving it and his position within The Avengers. CA may have also left his identity behind with the shield.
The Russo brothers (Anthony & Joe) are currently doing press for the Blu-ray and DVD release of Captain America: Civil War – the pair spoke to the Huffington Post about the status of the infamous character – relating excerpt can be read below.
“I think him dropping that shield is him letting go of that identity. [It’s] him admitting that certainly, the identity of Captain America was in conflict with the very personal choice that he was making.”
Rogers broke out the other former Avengers towards the end of the film, and he wasn’t wearing his CA costume from earlier when he did so – relating excerpt can be read below.
“Odds are his costume will change in Avengers: Infinity War and easy guesses for replacements would be his Winter Solider gear, which itself was reminiscent of his Heroic Age Commander Rogers persona. They could even draw inspiration from his more recent suit in Captain America: Steve Rogers.” – comicbook.com