The original Mortal Kombat had about 7 unique characters. Later versions had 40+ characters, but were just dumbed down versions of the originals. NOW.. imagine if you were able to upgrade Sonya's cartwheel with Raidens lightning blast. A short electrical charge would power up as she performs a cartwheel and shock you when she kicks on impact - giving her an extra second to cause damage.
The same could apply for KR. What if the Crossbow fort had the ability to have hybrid upgrades because it was next to a Wizard tower?? If an arrow kills an enemy 1)enemy could rise up and fight for you OR 2)enemy could explode releasing a small cloud of pestilence.
Sorry for the double post, but I was told to come here. No one wanted to here my suggestion in the suggestion forum.