I just realized that each 3rd Marvel Solo superhero film has a repeated pattern…
Iron man 3: Stark lost/got rid of the arc reactor
Captain America 3 (aka Civil War): Cap lost/gave up his shield
Thor 3 (aka ragnarok): Thor lost his hammer
They all lost a symbol of themselves. For Stark, the arc reactor was a literal part of him, keeping him alive all those years. For Captain America, the shield is a symbol of freedom and the one thing that was around from his past. For Thor, his hammer is the symbol of his power.
In every 3rd solo movie, they have lost their symbol if you will and become all the better for it. Stark no longer has to worry about whether he’s going to die if the reactor fails. Cap no longer needs the shield cause he has Bucky and doesn’t need to hide behind a shield anymore. Thor no longer has to rely on his hammer for his power, but is now the source of power himself.
I don’t know if this was intentional, but since it’s Marvel I’m gonna say yes. So Props, Marvel.