After checking with multiple sources, everyone has agreed on the "after credits scene":
Michonne hangs her katana up on her wall. She looks at it and then takes it down and puts it in her holster over her shoulder.
The next shot, a walker is seen walking along near the trucks where the wolves trap took place with Daryl and Aaron earlier in the episode. The walker is the red pancho dude that Daryl and Aaron were scouting earlier on. They lost him and the wolves found and killed him. The camera pans to a car that says "wolves not far" setting up the "bad guys" for season 6.