In just under a month, the San Diego Convention Center will host San Diego Comic Con, the largest of its kind. One notable group will be missing: the cast and crew for Agents of SHIELD. Even though they?ve had panels at each of the last four conventions, this year off and actor Clark Gregg thinks he knows why. The actor ? who plays Agent Phil Coulson, a fan-favorite in the Marvel Cinematic Universe ? took to Twitter to share his humorous take on the ordeal. Gregg tweeted, ?Really disappointed we won?t get to hang out with the world?s greatest fans at #SDCC17 #AgentsofSHIELD. The truth is Henry and Ian have become so sexy that SDPD and @marvel security could no longer guarantee their safety.? In all seriousness, the show probably decided to take a break as they?re getting ready to gear up for their fifth season, a big feat for any network television show.