In a blog post, Sucker Punch explained that the studio has no plans to return to the Infamous or Sly Cooper series at the moment, and contrary to some rumors, other studios are not working on these series.
“At the moment all our focus is on our current project and for now we have no plans to revisit Infamous or Sly Cooper and no other studio is working on these games.
The characters in these games are very special to us and have a special place in our hearts, so while we can’t say we’ll never open those doors in the future, there is no Infamous or Sly Cooper game currently in development.”
The last game in the Infamous series was Infamous Second Son in 2014 and it has been 8 years. Sucker Punch;s Infamous post-game Ghost of Tsushima received very successful reviews all over the world, and Sucker Punch is rumored to be working on the new Ghost of Tsushima game at the moment. When their focus is on this game, it seems that they do not want to spend time on other games.