So I heard/read (can't remember) that someone from the Midway team said that there is something special for completing all Kombo Challenges...anyways has anyone done it? Also, if you have was there anything worth mentioning that you saw or unlocked? Below is were I am at currently with the Kombo Challenges:

Completed -

1)Wonder Woman
2)Joker
3)Green Lantern
4)Scorpion
5)Sub-Zero
6)Shao Khan
7)Jax
8)Flash
9)Kitana
10)Baraka

One Kombo Left -

Raiden
Death Stroke
Lex Luther (will have completed tonight)

Is anyone close to completing them all?