Director Adam McKay recently told Collider that he definitely wants to do Anchorman 2.

I’m looking to do another movie, I might do this other movie called Channel 3 Billion which is kind of this science fiction/Brazil type comedy. Then after that, Will and I are like, "Let’s do Anchorman 2." …So you’re talking like 2 years maybe we’ll do it. But we’re going to do it, for sure.

I for one am pretty excited about it.  But I think he got the number wrong – wouldn’t this be the fifth or sixth Anchorman sequel?  I could’ve sworn one just came out a couple months ago.