I was going to continue, but I just saw that you are working on a feature that allows users to upload game icons directly, so I guess I'm going to wait for it. There are many Steam games with cropping issues on their icons.
Hey it's been a while
So I'm not sure what you'll want to do with these. The PS3/Vita/PS4 versions of Injustice 1 and Injustice 1 Ultimate have simple logo icons. I've made box art style icons that I think go better with the Injustice 2 icon, but you're the boss!