One of the things Valve can do to really help those that are mad at the quick release of Left 4 Dead 2
is to look at allowing the ability for gamers with both games to play with one another. Imagine an eight person squad in a new areas that are different from those in the first and second game, meeting up, and trying to survive. Well, it looks like Valve is looking into some sort of way
to combine the two games so hopefully they figure something out and will allow the two teams to meet up and send the zombies back to where they came from together.