Dude, not to toot my own horn here but you guys know how much time I dedicate to this damn game. I know how to counter pretty much everything. I know when to punish, how to punish, what moves have priority, etc. I'm not invincible, but it takes a lot to beat me.
This all changes when someone picks Kung Lao however. They slowed down Johnny since the demo because he was "too fast". Yet Kung Lao is faster than he was originally. Then we have the fact you can't jump in against him. One of the biggest things in MK is jumping in to start a combo. It's been that way since UMK3. Can't do it against Lao though. Then he has a low projectile, a projectile that can be guided up or down (to eliminate those pesky people trying to jump over your other projectile), and finally a teleport to dodge projectiles. Combine that with the speed of a rabid cheetah, and you've got yourself an invincible character. He can be beaten, but Johnny being my main, it's damn near impossible.