I'm just confused as hell..
Alright, so basically,
Tanya is the ambassador of the rebellion army, and defeats Cassie Cage, and Saves Kano's life, and is not on the roster. (main)
Kung Lao shows up as a zombie 2 times, in a tarkatan flashback, and is on the roster.
Rain is the general of the rebellion army beside Tanya, kicks Kotal Kahn off the roof, saves Mileena from being killed by kotal, and tries to teach Mileena how to lead, and is not on the roster.
Kitana shows up as a zombie once, and then is shown again in the ending, and is on the roster.
I guess NRS really only put the most known characters on the roster for the casuals, huh?