Another Offshore Turfs Secret District is on the way. This will be the 7th and I imagine we will see 10 of them based in Mexico. So far versions 1-7 all feature the Mexico Boss from their respective districts. I'm sure Zynga will move this feature to Los Angeles once the Mexico Bosses are used up. I hope they just stop. The loot items are shown below.
Isla Maria Madre
Boss Fight Mastery Loot