The Premium Edition, which comes with the pack, will bring six additional playable characters and five Kameo fighters, with these being partner characters that can help during matches, creating expanded gameplay possibilities for players.
The six playable characters are Quan Chi, Omni Man, Ermac, Peacekeeper, Takeda and Homeland Captain, while the five Kameo fighters are Tremor, Johnny Cage, Khameleon, Mavado and Ferra.
Additionally, the Premium Edition also grants you three days early access to the game, which launches on September 19th. Those who pre-order will receive access to the playable character Shang Tsung and will be able to play the closed beta in August.
Mortal Kombat 1 will have versions for PS5, Xbox Series, Switch and PC. More details in this link.