I'd laugh, but some of these pitches I'd actually like to see, so I'm a little sad.
The last one about "The Artifact", though... I recall this one part of a series called One Piece. These "Adventurers" shall we say, lead by a strong, intelligent man, arrive at an island full of strange natives that, since their village is overrun by a disease that can't be cured, decide to sacrifice the daughter of the village's strongest warrior to their "God", a giant snake. The leader kills the snake, and his crew is threatened to be killed, but the man offers a cure to the disease in exchange for his crew's safety. After many trials, the man and the warrior become close friends, the villagers are cured, and it turns out there's a city of gold nearby in which the adventurers are allowed to help themselves. Suddenly, the villagers refuse to talk the the adventurers, even the warrior is upset and won't talk to them. This is because they cut down these trees, which are said to contain the lives of those who have passed away in the village. The lead man, regretting his decision to cut down the trees without informing the village, decides to leave the island where the villagers live, and leave all the gold from the golden city there as a sort of apology. It's only until after he left that the villagers realized that those trees were actually RESPONSIBLE for the incurable disease they've suffered. The warrior, feeling great grief, shouts out the the adventurers ship, promising they'll meet again.
Later on, half of the island is blown into the sky, and the adventurer is branded as a liar and executed for "fooling" the king he lead to the island.
Sad, isn't it?