The Star Trek helmer, who steered the third instalment in the Tom Cruise spy series, told Sci-Fi Wire that he hopes to see a script for M:I:IV before the end of the year.
"We have a really cool story," he said. "It's being written right now by Andre Nemec and Josh Applebaum."
Asked if he would come back to direct the Paramount film, Abrams replied: "I'm open to anything."
> Mission: Impossible IV confirmed for 2011