A Rambo TV series is now in the works at Fox, where a deal was closed to develop Rambo: New Blood.
It's unclear whether Stallone will reprise his titular role in the series but he is onboard to executive produce, however, plot details suggest New Blood will follow Rambo and his son and Stallone is expected to appear but there is no confirmation just yet.
Jeb Stuart of Die Hard and The Fugitive will write the series, exploring the relationship between Rambo and J.R., his ex-Navy SEAL son. The character is completely new and has not been featured in any of the four Rambo movies. All of the information regarding New Blood's plot suggests Rambo would be a key character.