Unlocking MOKAP and BLAZE:
It ́s very easy to unlock mokap and blaze.
First you gotta go to the krypt and buy 2 graves:

YP (Mokap) for 511 gold coins
PN (Blaze) for 684 onyx coins

Then you have to beat konquest mode with every character (including all unlockable characters except mokap and blaze).
After completing the konquest missions, Blaze will do his martial arts dance.
When he ́s done you can use them both.

Mokap= Choose Cyrax while holding the down button
Blaze= Choose Raiden while holding the down button

Mokap= Karate, Tai Chi, Tae Kwon Do.
Special moves:
1.Fire Ball
2.Flip Kick
3.Charge Punch

Blaze= Hapkido, Jeet Kun Do, Xing Yi.
Special moves:
1.Flame ball
2.Flame uppercut
3.Flame Slide