User blog comment:Long hoang/MK10 story designer/@comment-1421951-20110819045448

Shinnok prepares to invade Earthrealm and Outworld but is interrupted by the return of Lucifer, the original ruler of the Netherrealm, and it becomes a three-way battle between the the forces of Raiden, Shinnok, and Lucifer.
 * Skarlet debuts as a full-fledged character with a role in story mode and every thing. She appears as Shinnok's enforcer after he promised her to resurrect Shao Kahn in return for her services (later revealed to be a lie in her ending)
 * Motaro makes his four-legged 3D debut as Lucifer's lieutenant.
 * Sub-Zero and co. are rescued from Quan Chi's control, the rescue reverting Sub-Zero back to his human form (i like CSZ, but I'd rather not keep him if it means giving up the classic)
 * Upon learning the truth about his family, Scorpion joins Raiden's forces and partners up with Sub-Zero for the remainder of the battle (because you know you want to see the destruction that Deadly Alliance could cause)
 * Taven is awoken early as opposed to Daegon and joins the fight against Shinnok and Lucifer (I think Taven would have been more popular had he been in a better game)
 * New fighters: Leviathan, a Raptor who serves Lucifer, has aquatic abilities, responsible for Lucifer's return; Monokrome, an Outworlder seeking to restore the tarnished name of his home realm, has Light-based abilities; (that's all I've got for now)