Save a few photo leaks and a Television Critics Association preview, "Two and a Half Men" has kept the details of its new season under lock and key. Major ratings are at stake: with Ashton Kutcher replacing Charlie Sheen, there's a whole lot of anticipation to see how Sheen's character is written off the show, and just how Kutcher will fit in with the neatly packaged 22 minutes of broad comedy.Thus far, it's been made public that Sheen's character, Charlie Harper, will have died in the time between last year's shortened season and the new go-round, and that Kutcher will play Walden Schmidt, a broken hearted internet billionaire.