I think it'l be fun to talk about everyones speculations and concept idea for new Special infected since LFD3 'may' be in the works Only makes sense that I start.
Igniter- Greasy and wet in appearance this Infected is in fact doused with kerosene ready to inflict some serious burn damage. His attack will be a all or nothing attack cus when he ignites himself he's gonna start taking damage so you better not miss, once ignited he will charge in a fit of firey rage, lighting everything in his straight path whether it be commons, survivors or even other specials, he will continue until he reaches his target similar to a charger. He would have a decent ammount of health due to the high ammounts of self inficted damage he'll deal to himself and the recharge time would be pretty long as the charge is supposed to be an all or nothing attack.
Basilisk- You'l see her lurking in the shadows, maybe if you listen hard enough you could hear her cracked breathing and if you're uquick enough you just might survive her razor like embrace, she is a Basilisk and she will rip your throught out and no one will ever know. The Basilisk has a pointy facial structure and an almost reptile like appearence and move pattern. She has no primary attack as like the witch she waits for her prey using the shadows and hiding behind walls and props to her advantage, she has an advantage above other infected and witches by hiding above door frames in wait for her victim to walk through the door and into her trap. She would roughly have the same ammount of health as the hunter and attacks with razor sharp claws.
Tar- Sickly and frail the Tar didn't have long left for the world prior to the infection, suffering from a terminal illness. The Tar has a Spitter like attack but instead of an acid projectile the Tar fires, well Tar. The Tar projectile does no damage to the survivors but instead greatly reduces their speed making them vulnerable for an attack.