First, gotta say I'm a ninja whore, so the more ninjas looking like proper ninjas, the better. Having said that I'd love to have Rain, Chameleon and (dream) Tremor, and also a NEW male ninja character.
I'd love to have Bo Rai Cho, we need more crazy gooffy chubby characters, at least we need one! and I could really use some more humor in the characters themselves and their moves. I'd also enjoy a little Drahmin, just cause he could look sick and demented now and could have great fatalities.
I also want Frost and Cyber Reptile for similar reasons, Frost could be another chance to redeem NRS from their horrible unimaginative "ice" fatalities, c'mon, cyber sub-zero's second was awesome, but other than that... always lacking man, incredible, bring on Frost, fas and furious with two badass fatalities. Same for Reptile, I'd enjoy haveing Cyber Reptile with some slick moves and two badass fatalities, using more power from the suit and his cyborg enchancements allied to his evil animalistic nature.
Can you imagine frost or sub-zero creating a wall of ice, than sticking the enemy to it only to quickly pull them off making their skin to stick to the ice wall, revealing a body half-peeled... I also always thought of sub-zero cutting the enemy's throat, then freezing the blood coming out of it, the enemy falls and his own frozen blood becomes a puncturing weapon that cut off his head, the head then slides through the frozen blood that on the ground looks like a slider... anyway, so many possibilities, I mean thousands... and yet they always come up with turn to ice, explode, turn half ice... take hal off... blabla, screw that... and sorry for going so out of topic here