Season 12 will be in Panama again, but the twist is that there is an "Exile Island" where castaways may have to spend one night or more there by themselves (like Janu in Palau). And the ad said that there will be a "secret" on the island that may help them to win the million dollars. Also, they said the tribes will be divided in "a way never seen before".
Looking forward to Survivor: Exile Island!