There have been constant rumors that Coulson will fall victim to Joss Whedon's habit of killing off popular characters. In an exchange of tweets, Clark Gregg himself gave a broad hint that the SHIELD agent isn't in Whedon's sights after all.
That took a load off my mind. Now we can speculate about a future Phil Coulson: Agent of SHIELD movie/TV show/cartoon/comic/whatever. Who's up for that?