http://www.mortalkombatwarehouse.com/mk/NOTE:
*You can only choose 2 characters due to Tag Mode in that game and since the Noob-Smoke Alliance in MKD
EDIT:
MORTAL KOMBAT FOR VITA IS OUT. GOOD LUCK VITA USERS.Lucky Ninja Boxes are:
*Klassic Costumes [4 MK1 male (Scorpion, Sub-Zero (Bi-Han), Reptile, Ermac)+3 UMK3 (Kitana, Jade, Mileena)]
*Klassic Cyborg [MK3 (the originals (Sektor & Cyrax), except Smoke due to timeline interference by Raiden)]
*Klassic Noob-Smoke [MK2]
*Klassic Female Ninja Friendships [MK2 (pretty simple: Kitana & Jade, as in)]
*Klassic Kuai-Liang/Sub-Zero II [MK3 based MK: DotR+MK3 Cyborg (since both Sub-Zero & Smoke's timeline being re-write)]
*Klassic Vita (which does not include in console versions)
**DLC Fighters Alternate costume (i'm not sure what are they look liked, except Skarlett already have 1), including Kratos' (probably his battle armor from God of War 2 intro)
**MK2 - Scorpion, Sub-Zero (Kuai-Liang), Reptile, Ermac (as seen in Sub-Zero's cutscene during MK2 arc), Mileena, Skarlett (since there's an MK2 glitch)
**MK3/UMK3: Scorpion, Sub-Zero (Bi-Han), Reptile, Ermac, Noob Saibot, Smoke, Rain, Skarlett