The Agents of SHIELD Twitter account has recently tweeted this:
The first part of season four Robbie Reyes aka Ghost Rider was introduced to us. When I first heard that Ghost Rider was going to be in the Marvel Cinematic Universe and ON Agents of SHIELD I had so much enthusiasm and excitement! I had been wanting to see some interpretation of Spirit of Vengeance, and Gabriel Luna did justice.
This is all speculation with this tweet. Agents of SHIELD is on tomorrow so they COULD be referring to tomorrow’s episode or maybe future episodes. I hope that Reyes does come back even if he is not on cable television. I know there are some fanplots in which Reyes teams up with Frank Castle aka The Punisher (Jon Bernthal). I am extremely for this. I think it would be amazing if we could see the shows intertwine since there are issues with the movies referencing the shows.