Shogakukan has recently announced that Naoki Urasawa and Newline Cinema have reached an agreement on the production of a live action film based on the Monster series. A formal contract should have been signed last summer, although I don't have any news nor official confirmation on that.
The release date has yet to be decided and other details are also still unknown; But I'll be posting news here as soon as I get to know them :) Or if you're interested, you can go check from time to time the IMDB page for the project right here, just in case they put some news up anytime.