Mortal Kombat 12 in the Pipeline - Actor's Tweet Suggests
Mortal Kombat 12 has probably been in development for some time now. Another indication of this may have been a Twitter post by actor Andrew Bowen - the game's Johnny Cage.

Reports that 2019's ending for MK11 and focusing on the next game.
The first fairly significant hints about it appeared about six months ago MKX and MK11 (via VGC).
In the short video we could see Bowen near Warner Bros. headquarters. In the background, we could hear a theme resembling the one from Mortal Kombat 2's intro; there were also words: "Every deadly technique. It's savage combat".
The best evidence of the message of this video is the fact that it was removed rather quickly - probably on the recommendation of Warner Bros. However, many people managed to see it. What's more, it was copied and shared on the Instant Gaming (@InstantGamingIT) profile on Twitter (below). Everything seems to indicate that the announcement of Mortal Kombat 12 may be getting closer.