Who knows how they will depict the bat cave? But, the very fact that it is being depicted on a treasure-hunting shows that they are trying to depict it as having something of value. The reality is that there was a guano operation up there many years ago (circa 1930) where they cleaned out all the guano to export it as a vital ingredient in the production of gunpowder at the time. So if there was ever anything of value up there, it's long gone by now.
Some fool is going to think otherwise, and try to get up there. The only thing he'll succeed in doing is endangering himself and the fragile bat population that's up there, not to mention the risk of contracting histoplasmosis, or rabies, or getting knocked out by the ammonia fumes.