After going the big expensive blockbuster route with The Sorcerer's Apprentice, director Jon Turtletaub is scaling back.  THR reports that Turteltaub will direct the Las Vegas-set comedy Last Vegas (oh, it's a pun.  Now I get it).  Written by Dan Fogelman (Crazy, Stupid, Love.), "the story centers on a quartet of retired boomers who are called upon for a Vegas bachelor party by their friend, a ladies man who is finally settling down and marrying a woman half his age."  Or to put it another way, it's The Hangover with old people.This is going to be a project that comes down to casting and it has to be more than just "Oh, old people.  You're supposed to be tired and sleepy but instead you're raucous and adventurous!  Wacky."  Back in April 2010 we reported that Fogelman had earmarked a role for Jack Nicholson, and it definitely sounds like a project he'd be well-suited to smirk his way through.