Successfully complete the indicated task to unlock the corresponding premier skin, which are alternate characters that are used as shaders for pre-existing characters. They do not alter the gameplay of the original character, but they do affect their voices, dialogue, and aesthetic appearance.

Golden Age Flash (The Flash alternate): Purchase for 6,000 Source Crystals.
Grid (Cyborg alternate): Link your account to the mobile version of Injustice 2.
John Stewart (Green Lantern alternate): Purchase for 6,000 Source Crystals.
Mr. Freeze (Captain Cold alternate): Purchase for 6,000 Source Crystals.
Power Girl (Supergirl alternate): Purchase for 6,000 Source Crystals.
Reverse Flash (The Flash alternate): Purchase for 6,000 Source Crystals.
Vixen (Cheetah alternate): Purchase for 6,000 Source Crystals.