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ThoughAvengers : Endgamewas release in 2019 , theMCU ’s Phase 4still has yet to unwrap Captain America ’s outstanding mystery in the movie . During the battle with Thanos ( Josh Brolin ) , the original shield takes a significant beating while Captain America ( Chris Evans ) is fighting the Mad Titan one - on - one . Though Steve Rogers wields his shield in one hand and Thor ’s mallet , Mjölnir , in the other , Thanos manages to chip away at the notoriously durable vibranium of the wiz - spangled weapon , intimately break it in half .
Consequently , Steve does not take the shield with him when break back in sentence to come back the Infinity Stones after the battle . He ultimately decides to stay put in the past and reappears as an old human being only sec after leaves . Inexplicably , Endgame’solder version of Stevebrings the shield back with him - in perfect condition - and eliminate on the Captain America carapace and cape to Sam Wilson ( Anthony Mackie ) , the implications of which are further explored in the Disney+ seriesThe Falcon and the Winter Soldier .
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However , the question of how Steve obtains this intact shield is leave puzzlingly unsolicited and unanswered . Though the time - travel principle laid out byAvengers : Endgameand subsequent MCU undertaking such asLokiare often mussy and largely incoherent , Steve ’s return to the past is one of the most vexing plot gunpoint of the dealership . It is established inEndgamethat changing the past can not vary one ’s own present or past . Therefore , if Steve seemingly could not do anything to alter the class of his retiring self , that would entail thatCaptain America ’s shieldwould have watch over the same track by his side as well , ultimately lead to its wipeout .
Steve ’s riddle raises many issue within the canon of the MCU . For example , Peggy Carter ( Hayley Atwell ) has a fit future too , as see inAgent Carter , Captain America : Winter Soldier , andCaptain America : Civil War . But , sure , Steve going back to marry her has to change her life importantly , which should n’t be possible . to boot , Lokiestablishes the musical theme of a Sacred Timeline and its enforcer , the TVA , who prevent edition like Steve from doing on the nose what he does - meddling with the continuity of the world .
Since Steve ( and for a while , Tony ) has the shell at any given point from World War II until the final battle with Thanos , there is no time when old Steve could have taken it that it would not be missed , makingthe ending ofAvengers : Endgameseemingly unimaginable . However , with the introduction of the multiverse , it is perhaps feasible that old Steve somehow find his version of the shield from another universe during his journeying to return the Infinity Stones . Maybe his quest led him across the mulitverse to a timeline world in which Captain America was dead or retired , return the shield unneeded . Though there are many hypothesis about what could have hap once Steve went back to the past tense , at this peak theMCU ’s Phase 4does not seem to have any design of address them .
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