On the heels of the Xbox 360 Achievements story, Midway has now confirmed the list as truth and revealed those final four characters as the last pieces of the roster. From the press release:

Shao Kahn, Darkseid, Baraka and Lex Luthor Join the Cast of Super Heroes and Super Villains in the Most Anticipated Fighter of the Year

Today Midway announced the complete cast of characters in the epic fighter, Mortal Kombat vs DC Universe. Rounding out the powerhouse line-up are the final villains Shao Kahn, Darkseid, Baraka and Lex Luthor. Gaming enthusiasts and comic-book fans alike be warned! Worlds will collide this November when Mortal Kombat vs DC Universe crashes into store shelves for the PLAYSTATION®3 computer entertainment system and Xbox 360® video game system and entertainment system from Microsoft.

There is also a new teaser image featuring Scorpion and Batman to go along with this latest announcement from Midway. Click here to view the press release in full.

Our thanks to Midway for this confirmation!