Ahead of San Diego Comic-Con, “Marvel’s Agents of S.H.I.E.L.D.” teases a possible big announcement at the annual convention. On Wednesday, June 22, the show posted on its official Twitter and Instagram accounts aphoto of a train decorated with an image of a flaming chain.
“Get fired up! Marvel’s #AgentsofSHIELD knows how to get to you #SDCC in style,” so read the caption accompanying the picture. The fiery ad soon sparked a speculation that Ghost Rider could appear in the upcoming season 4 of the ABC series.