I know you said Wings of fire, but I haven't read it and I know nothing but warrior cats so...
I'll just give an idea:
It's 2048 in the future and there's a new president who was voted. He/she somehow convinces to pass a law called 2%. A very complex test that people at the age of 14+ has the option to take. Right now, everyone lives in a trashed, graffiti, demolished area where society is at it's worse. Murderers, crazy people, Thieves, innocent people, children, orphans, and family's live in this place and are loose. If you agree to take the test you will be sent to a massive building where you will be staying and where the test will be held. The test takes more then two weeks to accomplish and only the smartest 2% will make it through. If you pass you will be sent to a nice place, the opposite of where you were before. Where society is in order and only good and the smartest live. If you don't pass you will be sent back and you'll never have another chance to escape the prison that is and used to be your home...
So, the reason how the place got demolished and destroyed was because of an outbreak and down fall of society. The 2048 president (I'll think of a name) convinces people (Mostly bribes, cheats or will do anything to get he/she's way) to let out all of the prisoners, thieves and murderers loose in the place and that's how everything got in place for the 2%. If the place was like that people would have no choice but to take the test in order to escape and have a better life for their friends/Family/Partners etc. You only got one chance to take the test, if you said no, then you'll never have another chance. It's the same thing if you didn't pass.
The test is mostly based off of mathematics, Political education, all the arts, Complicated puzzles etc and is like I said, extremely hard to pass and get down.
If you take the test and you pass then you better hope your friends/family pass too because if you pass you cannot take your family/friends with you unless they passed themselves. Cheating will automatically get you sent back or killed.
This "Place that is opposite from where you were before" is a massive artificial island/land in the middle of the ocean. It's the same thing as mordern day but with better and advanced technology such as flying cars and eye contacts that can help you identify such things. There's buildings, malls, cafes etc.
There is a group of people that are rebels against this law and will try to get people to the island with or without taking the test. The president is after these specific groups of people since they are a threat to his/hers ideas and plans. If this is a winner or you want more to make sure, just ask me. I already have a ton of ideas and this is based off of some series I watched but I changed up multiple things to make its simpler yet more interesting and PG. (I changed a WHOLE bunch)
Mods, please let this throughhhhhh!!!