Plans are going forward to relaunch the National Lampoon 'Vacation' film series that was all the rage in the 1980s. Christina Applegate and Ed Helms will star. Producers are in negotiations with the films' original stars, Chevy Chase and Beverly D'Angelo to reprise their roles as Clark and Ellen Griswold, though their appearance is being planned as a cameo throwback to the original series. For more click here