In season 3 of Agents of S.H.I.E.L.D, Agent Ward was possessed by a demon known as Hive, created in a lab to physically embody all of Hydra’s ideals. It is the amalgamation of all beings who have been sacrificed in the pursuit of bringing the beast back through a portal. He had the power to sway In-humans to his cause without their will, he influenced Daisy which pushed Coulson to the edge and he put together an elite team of secret warriors to take on the Hydra God.
Recently, the show-makers confirmed that popular comic-book character Ghostrider will appear in season 4. The famous actor Gabriel Luna (Tony Bravo in Matador) has been cast to play the role. He will be the most recent incarnation of Ghost rider i.e Robbie Reyes instead of Johnny Blaze At the San-Diego Comic-Con, a tram was showcased which had a flaming chain, fans perceived it as a cue for Ghost rider. On one hand, fans are saying that Marvel needed a game-changer to sell season 4 of the show and this is a brilliant move as in-humans have already been introduced into the show. Hence, he can be someone who may take the place of Lincoln who sacrificed himself to take down Hive (HYDRA God). On the other hand, a section of fans believes that this reeks of desperation and there is no synergy whatsoever between Ghost rider and Agents of S.H.I.E.L.D.
There is a speculation that a comic-book character Human Torch is secretly “The Director” who will replace Coulson as the head of S.H.I.E.L.D. He will be played by Jason O’Mara (Terra Nova, Complications). His character is said to have a long history with S.H.I.E.L.D and the only person possible is Jim Hammond. He had a brief appearance in the first Captain America movie. This would definitely be a great fan service by Marvel studios. His presence in the show actually makes a lot of sense. He has always been very guarded about his secret identity, and one can see that his identity be revealed in the mid-season finale.