Knowing with Nick Cage?

The fact is in the film itself, aliens came and chose those kids to restart a new race on another planet, which we saw resembled the garden of eden. And yes when the aliens flew away they resembled angels, The fact is that in the film it was aliens and another planet, but yes the directors clearly wanted this to symbolise angels and Eden, but decided not to, probably because it would have felt like a bit of a rip off, and maybe too overly religious for every viewers liking.