So, in January 2013, it is learned that Scott Gimple will replace Glen Mazarra as show runner:
http://ca.ign.com/articles/2013/01/1...ead-showrunner
In March 2013, it is reported that David Morrissey will return to The Walking Dead as a regular cast member for season 4:
http://www.hollywoodreporter.com/liv...rrissey-431929
Filming for season 4 begins in May:
http://screenrant.com/walking-dead-s...re-start-date/
In August 2013, Morrissey is cast in a different pilot on AMC:
http://tvline.com/2013/08/28/david-m...on-4-governor/
Season 4 begins and we get two Governor-centric episodes at the end of the first half of the season that have little to no connection with the rest of the main cast. Then he is killed off in the half-season's final episode.
I wonder what changed between the writers/producers of the show and Morrissey to go from being a regular cast member to basically an afterthought in a couple months?