Robert Rodriguez is now working on a sequel to Machete, and Mel Gibson might have a role in Machete Kills.
According to Deadline, Gibson is in discussions to have a supporting role co-starring Danny Trejo as the former Federale with a penchante for blades of all sorts. In the sequel, Machete is "drafted by the U.S. government to track an arms dealer through Mexico before he can launch a rocket."
Gibson's role isn't yet defined, but he will be in the movie. Rodriguez has been looking at Gibson from early on along with Michelle Williams. There's no word yet on if she will be in the film.
The Hollywood Reporter reports that Rodriquez has also said that he will be directing on his own this time unlike the original when he split the job with Ethan Maniquis. While that may be his plan, he also has the big sequel for Sin City also on his plate. "Machete looks like it’s going to go pretty quickly so it’s possible that I will direct the whole thing.”