Yes, it was an original story. The concept of 'The Purge' introduced a unique and disturbing dystopian idea of a society where all crime is legal for a set period of time. It had its own distinct plotlines and themes that hadn't been explored in quite the same way before in mainstream media.
Well, an 'Evil Morty' fanfic in the 'Rick and Morty' universe can be really interesting. Evil Morty is such a complex character. In these fanfics, he could be explored further in terms of his motives. Maybe he's tired of being in Rick's shadow or he has some grand plan to take over the multiverse that wasn't fully shown in the show. Fanfics give the writers the freedom to expand on his backstory and what makes him tick.
In such a fanfic, one aspect could be how Jessica views Morty. She might initially be dismissive or not even notice him, but as the story progresses, she could start to see his hidden qualities. Also, the fanfic could play with the different dimensions in Rick and Morty. For example, there could be a dimension where Morty and Jessica are already a couple, and Morty from our main dimension tries to learn from that version of himself to win Jessica in his own world.
No. 'The Purge' is a work of fiction. It's a creative concept that imagines a world with a very different social structure regarding violence and law. There are no real - world events where a government sanctions a period of lawless killing and mayhem like in the movies.
There might be a fanfiction where Sam and Dean Winchester find themselves in a town during the purge and have to figure out a way to stop a powerful supernatural being that is taking advantage of the lawless night. They could team up with some local survivors who have some knowledge of the supernatural.
Yes, 'The Purge' is loosely based on some real - world concepts. For example, in some areas, there are periods of lawlessness or high crime rates that can be seen as a very, very loose inspiration. But the movie takes it to an extreme with the legalized annual purge.
The 'the purge novel' could be about different aspects. It might focus on the psychological impact on the people who live in a society where there is a purge. It could tell the stories of survivors, how they cope with the fear and violence during the purge period. Also, it may explore the political or social reasons behind the existence of such a radical system in the fictional world.