The characters that I would like to return (these are not the hidden characters).
Good Guys
Sub-Zero (Joins Raiden in his quest against the Dragon King, wants revenge for the destruction of the Lin Kuei.)
Raiden (Leads Earth's warriors for battle in the Outworld against the Dragon King)
Scorpion (Joins Raiden in his quest against the Dragon King, to go to the heavens he needs to kill the Dragon King.)
Johnny Cage (Stranded in the Outworld, fights to survive against the Oni and the Vampires.)
Kung Lao (Joins Raiden in his quest against the Dragon King, wants revenge for the destruction Earth.)
Sonya (Joins Raiden in his quest against the Dragon King, wants to avenge the death of Jax by killing the Dragon King.)
Kitana (Leads an army into the Outworld to repel the Dragon King's forces into entering Edenia.)
Kenshi (Joins Raiden in his quest against the Dragon King, helps Sonya in avenging the death of Jax.)
Cyrax (Seperated from Sonya by Sektor, he evades Sektor to regroup with Sonya and Kenshi in the Outworld.)
Bad Guys
Kano (After betraying Shang Tsung and Quan Chi, Kano joins with the Dragon King in exchange for a portion of his army.)
Baraka (Joins forces with the Dragon King in exchange for a realm for his people to live in, meets Kitana's forces in the Outworld.)
Reptile (Possesed by the Dragon King for sometime, revives the mummified corpse of the Dragon King and serves as his right hand man.)
Frost (Betrayed the Lin Kuei and destroyed it for the Dragon King, wishes to kill Sub-Zero.)
Sektor (Pursues Cyrax in Outworld, wishes to destroy all cybernetic ninjas but himself.)
Drahmin (Leads a legion of Oni to cause chaos in all of the realms.)
Nitara (Leads an army of Vampires to steal the Dragon King's power and take for their own.)