This is a shock to Valve fans, usuallya sequal is never released so quickly, and there is not a ton of new stuff in Left 4 Dead 2, so many feel Valve is just making a sequal for the money, as they did promise some DLC updates, but it appears Valve went straight to work on the sequal and not what they promised.

Aside from that, Left 4 Dead 2 will be a great game, however it will severely harm or kill the original, as once the new one is out the online for the original will slowly die off. I think that they should make the old campaigns playable in the new Left 4 Dead 2, or atleast make the price cheaper for those who bought the original, as Left 4 Dead 2 is not really a whole new game, but more like DLC that you have to buy, that renders the previous game useless.

Overall, I still think it will be a great game, and I plan to buy it as soon as it comes out!