He extends Mjolnir toward the mystery figure, and the hammer rockets into the outstretched hand of none other than Steve Rogers. What has everyone talking is which Steve Rogers this actually is. But, one theory making the rounds claims this isn't the Steve Rogers audiences have followed throughout the MCU. While imprisoned after the events of 2012's The Avengers, Loki once again transforms into Captain America to mock how noble and righteous Steve is. Imagine if Loki, disguised as Steve Rogers, reaches out and calls the hammer because he has actually become worthy.