I like the outdoor environment. I also like the idea that they said there would be different paths. That will make a very replayable game even more replayable. 1,000 zombies a map I had not heard, but that sounds awesome.

To the person that said "I still can't accept the new content being justifiable for a new game." Isn't that what almost EVERY sequal is? L4D is nothing about story, so even if it came out in ten years there wouldn't need to be a story. A sequal is something with some things new, but still the same type of gameplay with some tweaks and add-ons.