The Indiana Jones movies are good when they have some basis in real stuff - like Nazis and the Ark of the Covenant in "Raiders Of The Lost Ark" and Templars and...well, Nazis again...in "Indiana Jones and the Last Crusade".
When Steven Spielberg ventured into fake temples and 1950s alien hokum, we got movies better left to AFI members to have to endure. So for Indiana Jones 5, he should throw out whatever bad idea he is working on and read about Qin Shi Huang's tomb. The first emperor of China created a courtyard-style palace tomb inside a 22-square-mile mortuary compound guarded by more than 6,000 full-size statues of warriors, musicians and acrobats.
The buried palace measures 2,263 by 820 feet and includes 18 courtyard houses overlooked by a main building. That's 6,003,490 cubic feet, one fourth the size of the Forbidden City in Beijing, for just one tomb.
So what is the problem? Start exploring. Chinese archaeologists are more of the modern 'we don't dig' kind than the Indiana Jones adventurer myth; and they believe his burial place is full of deadly traps that will kill any trespassers. Not to talk about deadly quantities of mercury.
Archaeologists Think Hidden Imperial Tomb May Be Too Deadly to Explore by Jesus Diaz, Gizmodo.com
Calling Indiana Jones: Ancient Chinese Tomb Is Too Dangerous For Everyone Else