Showrunner deals aren't immediately negotiated all the time anyways. Literally the only reason this is getting focus is because of the feud with Chevy Chase.
http://www.deadline.com/2012/05/nbc-boss-bob-greenblatt-no-end-date-set-for-the-office-community-or-30-rock/
Asked whether Community creator Dan Harmon will return as showrunner next season, Greenblatt said, “I expect his voice to be part of it,” adding that it is still unclear if that will be in his current role or as a consultant.
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"One toot on this whistle will take you to a far away land."
-Toad, SMB3