So I was looking at all the next map evidence around here. I'm convinced the next map will be somewhere tropical. Maybe tropical isn't the right word, but hear me out.
-Loading screen: Shows ferns and what looks like abandoned ruins. [Link to Picture]
-Aztec Calendar: There is an Aztec calender near the vault with our favorite heroes trapped inside.
-Dead Ops Arcade: Has similarities for each level, but the one area that remains is a temple / overgrown area, much like the loading screen.
-'Send the Crew to Paradise': Tropical Paradise? Maybe someone should look up Aztec relations to the Nazi Regieme? Or perhaps the Schwartz Sonne (Black Sun)? Even the Illuminati.
So let's say, Central America?