Anyway some new ideas:
Idea #2 (Shoujo Idea Thing Based off of Mereana's idea)
Basically, group of survivors wake up on a random beach with no memories at all. From the beach extends a large jungle with no signs of human activity. They need to rely on each other for survival and to reclaim their lost memories. (Could be something like a Shipwreck or a Planecrash). Not sure if it's too general so it may need work to make it more original, let me know what you think
Also could you explain your idea Mereana about a disaster in a town and the story what would happen in it please?
(Old) Idea #3:
Well this isn't really a new idea, actually I came up with it a while ago for a novel but kinda forgot about it :/ anyway this story deals with lots of deep elements like human slavery, oppression and loss of freedom of speech and is generally a quite dark. Basically its set around a large city which is split into two parts; The Metropolis (The inner city and where the wealthy reside in a safe and peaceful environment) and the Dark Sector (The outer city and a slum where the inhabitants are treated like livestock for the Metropolis' gain). In the Dark Sector the inhabitants are forced to work in a large power factory known by them as 'The Machine', it is very dangerous and releases pollutants into their living area. Anyway the story resolves around the uprising of the Dark Sector as they try to break away from the oppression of the Metropolis and become their own separate community. This uprising results in the population barricading them selves within The Machine and using it as a fort to defend themselves from the Metropolis attack whilst cutting off the power source forcing them into a submission. However in the original concept the uprising fails and what happens to the survivors I never planned to disclose.
I should also mention that I never planned on setting a particular setting or time for these events as in my opinion made it more mysterious and foreboding. In other words the idea could have occurred anywhere at any given time. Also I don't expect this idea to get chosen but you never know