Kong: Skull Island almost featured a trippy LSD dream sequence!

In the Skull Island: Birth of Kong comic series, the Iwi have a concoction that they take that allows them to see the past and future, which is how our protagonists can see Kong's and Skull Island's past with the rest of his species and the war on the Skullcrawlers.

It's possible that this was even alluded to in the film proper when Hank Marlow says the Iwi told him that the survey crew was coming and that he didn't believe them at first. Given the fact that a perpetual storm surrounds Skull Island, I'm inclined to take that "seeing into the past and future" drug as the explanation.

It also neatly adds to the "maybe magic, maybe mundane" mysticism introduced in this film with the Iwi.

^It would have been an interesting way to introduce the sequel, you know? Just imagine it, while tripping on the Iwi concoction, one of the soldiers see's the Hiroshima bomb go off, the blast rushes through him showing a giant shadow behind the the mushroom cloud, the shadows tail circles around him and a blue light begins to blind him. Then he sees himself being held in a giant hand (kongs hand), it rushes up into the clouds where it reveals a city(lets say for fun, NYC) with lights and fire seeping out of the foreground. He hears roars emitting around him as the giant hand shakes and rumbles underneath him. Kongs hand begins to turn to dust and peoples terrified faces begin to take form out of the ash. People screaming and crying in horror as two giant shadows fight each other.

That would be my way to do it. But the after credit scene does a great job of giving everybody a taste of whats to come as well. Still love that ending.

With Jefferson Airplane playing White rabbit during the scene. LOL.