Mortal Kombat X has a new addition to the roster with the arrival of Tremor, who is available to purchase now for the game. Tremor made his Mortal Kombat debut back in Special Forces 15 years ago, and is only now properly playable. Tremor’s abilities allow him to control rocks, with his appearance taking inspiration from that. If you own the Mortal Kombat X Kombat Pack then Tremor is available at no extra cost. He is also part of the last bit of content Kombat Pack owners will get.
The other last addition to the Kombat Pack is the Klassic Skins 2 for Quan Chi, Jax and Kung Lao. A free fatalities update has also been rolled out to all players, and the characters that get these new moves are Mileena, Kitana, Kung Lao and Jax. If you don’t own the Kombat Pack then you can buy Tremor and Klassic Skins 2 together for PS4 at £6.49, Xbox One  at £6.39, and Steam at £5.59. Tremor alone will cost £3.99 across all platforms, while the Klassic Skins 2 Pack is priced at PS4 at £3.29, Xbox One at £3.19, and Steam at £2.79.
Source: Press Release
Starman
I think there will be another kombat pack. Besides Predator the extra characters haven’t impressed me and there’s a lot of omitted characters that people want in the game still.