As much as I think developers should be paid for their work, $40 seems a bit steep for what you are getting here.
Warner Bros. Interactive Entertainment and NetherRealm Studios today released a new gameplay trailer for Shang Tsung, featuring the voice and likeness of actor Cary-Hiroyuki Tagawa who portrayed the popular character in the classic 1995 ‘Mortal Kombat’ film. The soul-stealing sorcerer is the first of six playable fighters included in the Mortal Kombat 11 Kombat Pack, providing the best way to upgrade the Mortal Kombat 11 game experience with new downloadable content (DLC).
