Can't Download Sub-Zero PS4 fix: Go to the actual store, not the store within the game itself. Search Injustice 2 and go to the Add-ons. There should be a Sub l-Zero add
Injustice 2 and Injustice 2 Mobile: Link your accounts and earn rewards – DC Games
Injustice 2: Starfire Character - Xbox One [Digital] - Walmart.com
Amazon.com: Injustice 2 - PlayStation Hits (PS4) : Video Games