If you don't have the Kombat Pack 2 and would like try out the characters in the Pack, NetherRealm is treating you to some FREE play. Currently within the new Mortal Kombat XL towers you can try out Alien, Bo 'Rai Cho, Leatherface and Triborg all for FREE. You can purchase the characters individually or buy the Kombat Pack 2 for $19.99.
View Boon's tweet confirming this here.
View Boon's tweet confirming this here.