https://www.youtube.com/watch?v=sxmZ2njQ_fk

Today on Valve News Network, we take a look at an incredibly odd situation where it seems that Valve is back to working on something Left 4 Dead related. The evidence is a group of over 150 official Valve servers that players can't connect to, and some of the maps being played are new.

What is going on? Source 2? Left 4 Dead 3?