So far, here's my mains as I train:
1. Ermac-FREAKING beast in this game if you can use him....reminds me of UMK3+3D Ermac mixed lol, but better
2. Kabal-He's just sooo much fun
3. Scorpion-My main on the demo and at the GS tourney I attended, he's still one of my boys
4. Raiden-Still working on him
5. Cyrax/Cyber-Sub, Cyrax is good but there's some things about him that you could do in UMK3 that you can't in this game and vice versa so not sure if I'll stick with him or not.
6. Noob-Saibot-Great zoning and turtle character, but I need to train more and learn combos with him