left 4 dead 2 *possible spoilers*

some left for dead 2 things have been revealed.
30 weapons (so far silenced smg, chrome shotgun, axe, guitar, frying pan, chainsaw, katana, bat, pistol, sniper rifle, pipe bomb, molotov, gunmetal shotgun (not sure the difference), ak-47,

8 new infected (5 exclusive to thier campaign) plus the old ones. (charger-tank like infected put slightly weaker and faster; spitter-smoker like infected but spits acid instead of strangling you. also explodes into acid when killed; jockey-pounces on your head and requires you to move around erratically to get it off; hazmat common infected-wears a hazmat suit and resistant to fire;