Oh man Metallo talking about how he can go straight just before we find out Henshaw's depravity is some good dramatic irony.
Guy is gonna go apeshit next issue seeing his sister's body desecrated and turned into a weapon just like he did.
And here we see that ultimately Metallo is just an abused little kid who just wanted to be strong so he couldn't be hurt anymore. Sadly he took it to the worst logical conclusion.