I don't know what it is but I just love the idea of Kingdom Come Superman giving Injustice Superman the beatdown he would deserve.
What I could imagine what he would say before Injustice Superman attacks first.
Kingdom Come Superman: You say you have brought peace and justice but all you have just done was take away freedom bringing fear to the very people you used to protect going against everything you used to stand for. I understand how much you've lost losing your Lois and Metropolis, I too lost my Lois to the very same madman in my universe but I learned how to cope with it moving forward, her death and destruction of your city doesn't justify any of your actions which is why I'm here to stop you. Give this earth back to the very people you've enslaved.