Trying to Prevent Earth From Becoming The New Mars - Injustice: Gods Among Us (2013)

Superman: 

J'onn

Martian Manhunter:

Clark. Batman has left the cave. He's long gone. 

 

Superman:

Why are you working with him? Why are you working against me?

 

Martian Manhunter:

Because of what you could become. 

 

Superman:

And what is that?

 

Martian Manhunter:

I'm going to show you something. I want you to feel something. 

 

Superman:

What is this?

 

Martian Manhunter:

This is what it feels like. When your planet is overrun. When you are a part of a weaker species that is dominated by a stronger one. This is what it feels like to be ruled. This is what it feels like to be helpless.

... 

You know this feeling. 

Injustice: Gods Among Us (2013) #29 - Chapter 29