Here is a bit more information on what to expect.  What you might read is kind of creepy and brutal but it was reality for these civilizations:

By continuing their exploration of a hidden tunnel that was discovered in 2013, researchers have now uncovered a passageway leading to a circular structure which resembles a Cuauhxicalco – a ritual space which, according to ancient reports, was used to burn the corpses of Aztec rulers. This was accompanied by two sealed doorways, which archeologists speculate could guard the burial chambers of these sovereigns.

What do you think they will find?  Check back for updates on this archaeological find.

thanks to iflscience.com for the great info