In fighting games, the easiest way to make DLC are costumes. Look at Dead Or Alive 5 Last Round, to this day it is still offering dozens and dozens of costumes. But how would Injustice 2, a game where you can earn loot and gear randomly that affect cosmetically and has stats attached to it, make extra money?
Colours.
While this may seem underwhelming, context matters. Fighting game players, the hardcore ones, love new colours. Offering new costumes/skins as DLC will then mean attaching stats to them, which could lead to a pay-to-win situation.
Source crystals are the premium currency that will only be available via micro-transactions. You can buy colours (colour shaders as its called in-game), transform gear- changing the look of a gear to of another gear- as well as speed up the character progression to Level 20 (as long as you have already have another Level 20 character). Premier skins which are purely cosmetics will also be available.
As it sounds, it should be an okay implementation of the system. In the announcement post, it is remarked that the development team “value our community and want to be clear – you cannot ‘pay to win’ with Injustice 2.”
Given that the stats for gear will be disabled for ranked matches and how they are handling micro-transactions, it seems they are headed in a good direction. We will see how everything fares when Injustice 2 release on May 16 for the PS4 and Xbox One.