Sub-Zero -
Jazwares MK9 Sub-Zero repainted
XMO Cyclops upper arms
MoS Superman hands
Mezco MKX Sub-Zero sword

Scorpion -
Jazwares MK9 Scorpion repainted
G.I. Joe Retaliation Snake Eyes swords
Random hands

Cyrax -
MU Bleeding Edge Iron Man repainted
Jazwares Cyrax hairpiece

Shang Tsung -
IM2 Mandarin repainted
Darth Vader hands

Kitana -
Clone Wars Ventress repainted
DCIH Wonder Woman head
Various fodder for mask, skirt, and fans

Smoke -
Movie Thor Hogun
Prince of Persia head
MU Karnak skirt
Random hands and feet
Movie Thor Frost Giant axe

Kenshi -
Winter Soldier Captain America repainted
TDKR Bruce Wayne head
Avengers Captain America legs
Various fodder for everything else

Reptile -
Jazwares MK9 Reptile with a few touch-ups

Johnny Cage -
Jazwares MK9 Cage with a few touch-ups

Noob Saibot -
G.I. Joe Spy Troops Nunchuck repainted
25th Storm Shadow head
Unknown Joe arms and legs
Random fodder for the skirt

All this started with Sub-Zero and Scorpion. I liked the Jazwares figures fine but they felt like they were...too basic I guess? After that it was pretty much just me wanting to add some of my favorite characters until I ended up with the finished figures seen in the pictures.