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Image of the temple mock-up. No forbidden eye. No crystal skull. There is something at the top though. Looks like a beast with a huge open mouth... and ears.
But in the concept art it's red. Seems odd.
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Googling "Myan Red Temple" led to this:
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Looks the same. It's called Rosalila Temple:
A full-size replica of this well-preserved temple lets you take a walk through the Mayan age.
www.atlasobscura.com
The beast is apparently a Jaguar.
This seems a clear inspiration. Disney has taken it and elongated it. I'd say the beast in the Disney version looks different. More like a snake or crocodile... or dinosaur. But in case they are going with Jaguars:
en.wikipedia.org
Either way, if this is the design, I love it. It is very distinct looking.