Here is the cruelest irony: Injustice: Gods Among Us is already mostly playable offline. The core single-player battles, challenges, and even the card management do not require a constant connection. The game only needs the internet to save your progress to the WBID cloud, watch optional ads for bonuses, or participate in the "Online Battles" mode.
The main appeal is – especially useful if you have a metered connection or old phone with limited storage. However, note that “highly compressed” often means: injustice apk obb offline highly compressed patched