A photo tweeted by NetherRealm Studios on Father’s Day showed Johnny and Casey Cage together, in which they both were pictured in new costumes. Johnny’s costumes, as pointed out by nightmarestream, is the same outfit as Major Alan “Dutch” Schaefer from the original Predator Film.
This is teasing the already announced DLC that will include a Predator skin, of which there is no official release date. A patch has been released for Xbox One and PS4, but not yet for PC, that includes new skins for Johnny Cage, Scorpion, and Jax. In addition, a Predator skin, has also shown up in the games Kollection, despite not yet being usable.
There is no indication of when the patch will hit PC, or when the final skin pack will be released.