Second Story!?!

   So the Time Travel series has come to an end (maybe), and I have started to think about making a second story series. I made some ideas, although most are half developed ideas, and most of them are really unrealistic. Comment on which idea I should use, and also what kind of story I should make. Feel free to include the names of characters and the setting.

1. Someone finds out about a very powerful object that can grant you whatever wish you want.
2. The world is in poverty because of overpopulation, and only one thing can solve it. Groups start to form and massacres happen for competition of resources. A boy’s parents are killed in this and is forced to join a gang. He then has to kill a village girl, but instead escapes with her into another place and tries to survive.
3. Disease starts to spread. World population remains at 20,000. The last cities are Los Angeles, Shanghai, Berlin, New York, London, and Tokyo, all with a mere population of around 4,000. Then, a revolutionary medicine is made, but in it’s early stages. 50% of people who eat this might die. But everyone tries it.
4. The ocean completely covers 98% of the world. There is barely any land left. People are fighting to survive. Then a boy realizes that he can live underwater. He is outcasted as a freak when he was young, but as the oceans keep on creeping up, humanity realizes it’s last hope. Scientists try to inject his DNA to other people, but the ones that are injected with his DNA die instead of having the ability to live underwater. What will happen next????
5. A boy goes crazy and kills everyone in his classroom. He is sent to an asylum, and dies there, but soon after him, another boy gets crazy. Scientists realize it’s a deadly and very contagious disease called Crazy Richard. It only can affect boys though, and terror is spread through all the schools. Richard, a boy in a school, is very afraid. He thinks it could be no coincidence that the first infected boy was named Richard, and the second infected one also Richard. Peculiarly, all the boys infected were named Richard, and all came from cities with more than 10 million population. His situation was exactly like that. He was named Richard, and lived in New York. OH NO WHAT WILL HAPPEN TO HIM? Suddenly, right about at this time, the world is facing a meteor that will kill them in about a year. Scientist, also about this time, are realizing that Crazy Richard has a side effect of being able to live in intense heat, just like the environment the meteor will bring. Now everyone wants to get this disease,but when they get it, they still have the natural tendency to kill people. As a result, the worlds population decreases by half, and the meteor comes closer.
6. A girl fell off a cliff. A flying elephant caught her. She went into the clouds to only realize a herd of flying elephants lived up there. She joins the elephants. But living with the elephants changed something in her brain. She is now crazy. She acts like elephants, eats like elephants, and does everything like an elephant does. One day, a passing plane saw this herd of elephants, and the pilot thought he was helping the stranded girl by killing all the elephants and lifting her to the safe plane. She gets very angry and kills everyone and the plane as a result starts to plummet to the ground. Before the pilot died, he sent out an emergency call. In the end, she is put in a zoo.