There was talk about this last week, but today it's official:

After several weeks of negotiations, Community producer Sony Pictures TV just confirmed that there are deals in place for series creator/former showrunner Dan Harmon and former co-exec producer Chris McKenna to returning as executive producers for Season 5.

For some awful reason, I watched all of the Dan Harmon-less Community Season Four. There are still some apologists for the show online, but do not let them persuade you: It was garbage, and I'm not sure there's any way for this show to pull back from the awful mess that it became. But I'm not the most forgiving soul. How about you?