It seems like recently, we've had at least one beachy leg (or 'TnA' leg or bikini leg, depending on your tastes) that's in a tropical climate, or else a leg designed to get the racers out of their clothes - last season had the Seychelles, the season prior had Dubai (and Groningen, and Estonia, and Prague 2...), TAR 14 had Maui (plus Krabi and the fun run in Novosibirsk). Given how...telegenic our cast is, I'd expect at least one of these legs this season.
Barring something in one of the two Ghana legs, we've problably not had said beachy leg. If there *were* to be a future 'beachy' leg, my bet would be on the Philippines, or, less likely, southern Thailand (of course, they could really surprise me and go to the Maldives).