Having read the books, let me tell you this.
This movie will be another Eragon situation.
They’ve destroyed the concept so badly that there is no possible way that this movie will be any good. Artemis’ father is supposed to have been kidnapped by the Russian mob, not the fairies. They don’t deal directly with his rescue until the second book. Artemis is the one that discovers the fairy world, because he is “the only one young enough to still believe in magic, but old enough to put that belief to use”. And he is the villain of the first book. He kidnaps one of the fairies (Holly Short in the trailer). The first trailer for this had me interested, despite some egregious changes (Butler is supposed to be Eurasian, Judi Dench’s character was a man), but now I’ve lost all and any hope that this will retain any of the charm and wit of the books. Why do they do this? They take successful books and then strip them of all their character and twist their basic premise beyond recognition, and then they get surprised when no one likes it.