The trailer for Peter Billingsley's directorial debut, Couples Retreat (Universal, October 9), is online just now via Apple, and looks like a good bet to wrangle the lion's share of fall comedy dollars. Notwithstanding the domestic underperformance of The Heartbreak Kid, exotic-set laffers that splurge a bit with scenery and setting have obviously worked out well recently, from Tropic Thunder to Forgetting Sarah Marshall, and Couples Retreat has a gorgeous, crystal-clear backdrop — the sort that causes women to start nudging their boyfriends and husbands to call travel agents — to go with a solid, hell-in-heaven conceit that allows for plenty of good-time opposites-of-the-sexes friction. Malin Akerman's auburn dye job will help hold at bay awkward memories of Watchmen emoting, and the rest of the cast (Kristen Bell, writer-actor Jon Favreau, Kristin Davis, Faizon Love, Kali Hawk, Vince Vaughn and Jason Bateman, clockwise from top left) shows no evidence of a weak link. Color me stoked, in moderate-to-high fashion. Vaughn isn't a huge international draw, but I don't see how this does under $140 million worldwide.