Not to be a whiner (but there will always be one and I guess I'm that person this time) but why aren't they integrating L4D1 into L4D2, hardly anyone plays the original anymore, once in a blue moon can I actually get together a competent team to do anything in the game, god bless you if you try to get a versus match going. I love the original maps, and I'd love to see how they'd all play out with the new weapons and zombies (yes I know there are the custom campaign versions, but I'd love to hit quick match and go straight to Dead Air instead of making a game and sitting for like an hour getting people to join).
Unless L4D3 goes back to the original survivors hunting down CEDA and you have a whole new adventure with them, why not let the players have a fantasy team of old and new chars?