Actor to play John
This from www.japanzone.com (if you want to read more see the entry for April 16)
"Fictional Japanese-American assassin John Rain is coming to the big screen. Shiina Kippei (43) is to star in a mostly Japanese-language adaptation of "Rain Fall," the first book in the John Rain series by thriller writer Barry Eisler."
According the person who runs that site, there will only be about 15% English.
BUT, look on the bright side, with Hollywood's recent love for the re-creation of successful Asian moives, perhaps there will be a Hollywood version.(starring my favorite, Hiroyuki Sanada. If you don't know him he's been a huge star in Japan. Outside Japan, you might know him from his role as the villian in Rush Hour 3 or as Ujio in The Last Samurai)
Failing that, at least a special release with English subtitles.