Super excited to see the race visit Kochi!
Here's a few observations I had about the preview:
The sign behind Rachel most likely says 'Mombasa'. This will be as teams are leaving Africa.
When the camera flashes past a row of rickshaws, I believe this location to be at this junction:http://maps.google.com/?ll=10.000893,76.300773&spn=0.002805,0.005284&t=h&z=18
Googling of the 'Property Show' archway reveals that there was a 'Credai' property show taking place at the stadium just off that map in December. Also, a sign for 'Kerala Medicals' is visible, which is apparently also located at this junction. This would fit in with teams travelling from Cochin International, through the city of Ernakulam and to the ferry to either Fort Kochi or Vypin.
The shots of Bopper dancing are probably not at the Hill Palace, as we can see some water in the background. The Hill Palace is nowhere near any water. Also probably not the Parade Grounds, as the houses nearby aren't quite as grand as the ones in the background.
Also, one interesting point. Whoever refers to 'Bollywood' is actually in the wrong part of India.. That refers to Hindi cinema focussed more in the north. Keralan cinema is more commonly referred to as 'Mollywood'!