It won't even be released until September (that's a whole summer blockbuster season away) but Sony are feeling pretty confident about their remake of The Equalizer, starring Denzel Washington. The Wrap reports a sequel is now in the works, and Richard Wenk, who wrote the first film, is scripting the follow-up now.
They have reason to be bold though, as The Wrap reports test screenings for the film have been "through the roof," with one screening in December earning the highest scores for an R-rated movie in Sony's history. I think there might be cases where movies have tested very well and then gone on to not do so well at the box office, but this courseof action certainly seems reasonable given those results.
Washington plays the ex-CIA agent with a mysterious past originated by Edward Woodward in the 1980s drama series. Chloe Moretz stars opposite Washington as a young prostitute, in a role that was aged down from its original 20-something incarnation after the 15 year old actress impressed Washington, director Antoine Fuqua and filmmakers in her test.
Washington has no deal in place to reprise his role for any sequels, but I'm sure they won't go on without him so dealmaking is probably already underway.