Sorry, your not going to get one. However, a TV series should now be in production so you may get to see more. If it's shown in your country that is. You could (should) read the book/s. They give the unaltered and non compressed for film original.
The bangs get bigger, situations emotional and you get more attached to the group.
I believe ABC3 in Australia is making a 2nd mo ie for tv. As of approx September /October 2015 it was in post production.
shareABC3 in collaboration with the films production company have abandoned a sequel and have produced a six part series going back to the start (book one- Tomorrow). Principle photography was finished in December, ABC3 have yet to decide when it is to be broadcast.
www.tomorrowwhenthewarbegan.com