We already knew the Sub-Zero was going to be added to Injustice 2 as a combatant, but we hadn't gotten a look at his gameplay. Finally, NetherRealm Studios showed it off in a livestream today during E3.
A new trailer shows the Lin Kuei clansman doing a rather cold number on the Dark Knight, laying down ice for a slide move to get in close, using an ice blast to freeze the Bat in his tracks, and materializing an ice hammer to smash the frozen crusader into a far wall. All in all, a pretty impressive display.
Sub-Zero will be part of Character pack 1 coming in July, along with Starfire and Red Hood. That pack will be "coming soon," but players who have the Deluxe Edition of the game should be able to get him sometime in July. Red hood was released to Deluxe Edition holders on June 13, the first day of E3.
If you haven't already, you can purchase the character pack for $20.