While his return wouldn't make any narrative sense, there are some "Kingsman: The Secret Service" fans who are bummed that Colin Firth is a no go for the sequel. But it's time to move on, because the movie is pushing ahead and finding other people to join the franchise.
Deadline reports that Halle Berry is in talks to join 'Kingsman,' in what would be a two-picture deal. So yes, 20th Century Fox is already planning ahead for "Kingsman 3." And why not? Unless they really screw up the sequel, this series is likely going to be kicking around for a while. At any rate, Berry will play the head of the CIA, which falls right in line with the reported stateside setting of the followup. And given that she's wanted for further movies, her role is likely substantial.
The Matthew Vaughn-directed sequel is slated to open on June 16, 2017.