Yesterday we learned that Michael Douglas had entered negotiations to star in the “Hangover with old people” comedy Last Vegas.  The script, written by Dan Fogelman (Crazy, Stupid, Love.), centers on “on a quartet of retired boomers who are called upon for a Vegas bachelor party by their friend, a ladies man (Douglas) who is finally settling down and marrying a woman half his age.” Now Vulture reports that Robert De Niro is in talks to join in on the boomer debauchery.  Per their report, De Niro and Douglas would play characters that fall for the same girl, so either De Niro is secretly in love with Douglas’ fiancé or, more likely, an older actress will be cast in a different role that the two will fawn over.Moreover, Vulture adds that talks continue with Christopher Walken to take a co-starring role in the pic, but the studio wants to close De Niro’s deal before finishing up with Walken.  The latter is also poised to star in another “old guys are funny too” comedy called Stand Up Guys with Al Pacino and Alan Arkin.  I liked Crazy, Stupid, Love. well enough, and director Jon Turtletaub (National Treasure) knows how to make entertaining movies, so hopefully we're not just in for 90 minutes of Depends jokes.