The Prison
Tony Stark left the Avengers at the end of Age of Ultron. But now he is back, most likely being the first superhero to support the Accords. And he is bringing his toys back, including a new type of suit (that seems to be the Bleeding Edge). But he also brings something else.
In the comics, the supervillains and all those who were against the Registration Act were sent into the Negative Zone, to Prison 42. The prison was designed by Tony Stark, Hank Pym, and Reed Richards. Since Marvel doesn’t own the rights for the latter (and for the Negative Zone, for that matter), a change was made for the MCU’s Civil War.
It is a prison built underwater by Tony Stark alone, since Hank Pym is not his friend in the MCU. And we see him beaten down, weary, with a broken arm, and we might even say upset. And that is because the prison is intended especially for his fellow Avengers and, we believe, he now regrets doing that.
Is this his way of saying that it wasn’t worth it?
The MCU, for the moment, lacks supervillains. But this could also be a nod for the things to come, since such a large facility is simply too much for just a bunch of guys, no matter how powerful they are.
