And again whose fault is that? Batman's. He chose to continue shaming him for killing his husbando and antagonizing Supes rather than being the friend there for him. Letting his narcissistic ego get the better of him again if he were just his friend, got him the help, consoling, comfort, and therapy he needed, Supes wouldn't have fallen down the dark path he did or gone as far.
Thus Batman still being the true villain of Injustice if we go by the comics.
Doesn't matter if you feel guilt or not. Committing such an atrocity or any association with such, you should still be punished. That's how the law should work especially when it revolves around an act that makes 9/11 seem like child's play in comparison.
I could tell you right now if this were the real world, guilt or not, Joker and Harley both would have been on the electric chair, heck Joker would have been executed long ago given the mountains of bodies he's left.
Also, the difference with Vegeta is that he's from a setting with a confirmed afterlife where those killed can be wished back to life with the use of the dragon balls. This makes it easier to forgive characters and to redeem themselves. Yes, DC and Marvel have that but it's far harder and more of a task to do.
Yep, you got it, my all-time favorite character.
You win the cookies.
As Miyamoto mentions, they're all simply actors.
It would explain why they're rather good pals with Bowser when it comes to sports and kart racing.