It has recently been reported that there are a lot of speculations that Ghost Rider will be part of "Agents of S.H.I.E.L.D" for Season 4, which will premiere on Sept. 20.

According to Movie News Guide, the speculations were fueled further after Marvel released a casting call for two Latino brothers, which is highly believed to be Robbie and Gabe Reyes who are the central characters for the new Ghost Rider comics' series.

The rumors of Ghost Rider joining the roster of the show started when Marvel released a teaser image of the Agents of S.H.I.E.L.D logo burning along with flaming chains as part of promoting Comic-Con.

While the teaser image may be referencing to Hellfire, who used a flaming chain in the show, the rumor of Ghost Rider joining "Agents of S.H.I.E.L.D" Season 4 continues to circulate, as the casting call described the two brothers as one in a wheelchair and the other one as the most dangerous person in the room. Fans speculated that the description fits Robbie and his little brother Gabe.

According to Screen Rant, one of the reasons why fans are initially hesitant to believe that Ghost Rider will join "Agents of S.H.I.E.L.D" Season 4 is because of the cost of CGI, which will be needed to generate the transformation to the flaming bike rider. However, this is a challenge only if the Ghost Rider being cast would be Johnny Blaze. Choosing the all new Ghost Rider will resolve this challenge as transforming Robbie Reyes to Ghost Rider will only need minimal CGI effects since his transformation would not have to be a moajor production.

Marvel is expected to make the confirmation on Ghost Rider joining "Agents of S.H.I.E.L.D" Season 4 on Comic-Con on July 22.