So apparently Dan Harmon was indeed asked to come back, but there's still no official word.
Never heard of this site, but here's one reporting about it.
This is great news.
I read a report on this over the weekend that added his comment that he would "probably" do it (his words).
I didn't follow this super closely when he was kicked out - did NBC basically choose Chevy Chase over Dan Harmon, then let Chevy go (or he left) when he became too much to handle? then they asked Dan Harmon back?