When it returns for season 4 in the fall, Agents of S.H.I.E.L.D. will be the last remaining Marvel TV series on ABC since the network announced earlier this year that Agent Carter was canceled after two seasons and they would not be moving forward with the spinoff series Marvel's Most Wanted. Of course, Agents of S.H.I.E.L.D. was the first television extension of the Marvel Cinematic Universe and in its first three seasons the show tackled the dismantling of the government agency thanks to the infiltration of Hydra - as well as the emergence of Inhumans around the world.
At the end of season 3, Phil Coulson's (Clark Gregg) team of agents worked together to defeat the ancient Inhuman Hive, who inhabited the body of former S.H.I.E.L.D. agent turned Hydra operative Grant Ward (Brett Dalton). Thanks to a sacrifice from one of their own, S.H.I.E.L.D. lived to fight another day, but a brief time jump at the end of the finale teased plenty of changes coming in season 4. Now it seems the show may be offering fans more hints about what to expect in season 4 at Comic-Con International in San Diego this summer.
On Twitter, Agents of S.H.I.E.L.D. posted a photo (below) of the San Diego light rail decked out in promotional imagery from the show's fourth season featuring the fiery chains that are the weapon of choice for Hellfire (Axle Whitehead). Additionally, the tweet confirms the show will be attending SDCC, though it remains to be seen which members of the cast and creative team will be there.
— Agents of SHIELD (@AgentsofSHIELD) June 22, 2016
James a.k.a. Hellfire first joined Agents of S.H.I.E.L.D. in season 3 as an old Inhuman acquaintance of Lincoln's (Luke Mitchell) who had been denied the process of Terrigenesis by Jiaying (Dichen Lachman). But, after Hive won Daisy Johnson (Chloe Bennet) over to his side, he recruited James by granting the Inhuman his powers. Last we saw of James in season 3, though, he was knocked out by Melinda May (Ming-Na Wen) in a bar. So, it remains to be seen where his character will be when season 4 kicks off - whether he's still aligned with evil or if he's joined the ranks of S.H.I.E.L.D.
The Marvel TV series has had a big presence at SDCC since its first appearance in 2013. In 2014, the show announced the addition of Bobbi Morse a.k.a. Mockingbird (Adrianne Palicki) to the cast for the then-forthcoming second season. Last year, the show announced the Secret Warriors storyline for season 3 ahead of SDCC, then led a tie-in promotion for the Agents of S.H.I.E.L.D. Secret Warriors during the convention itself. So, it's likely the show will offer another big reveal before or during this year's San Diego Comic-Con.
What that reveal may be remains to be seen - though the promotional imagery revealed in the photo on Twitter hints it may have something to do with Hellfire. So far, we don't know how Hellfire will play into season 4, but the reveal of a Life-Model Decoy in the final minutes of the Agents of S.H.I.E.L.D. season 3 finale seemed to hint that the droid would be a main focus when the show returns. Still, Hellfire's weapon of choice does make for a much cooler visual - and will surely excite fans who were hoping to see the Inhuman return in season 4.
Agents of S.H.I.E.L.D. season 4 begins airing on ABC in Fall 2016.
Source: Agents of S.H.I.E.L.D.