What arrives in the film "Arrival"

UFO

"Hint: "It's not a plane or a bird, but it definitely flies—and it's not from around here." This hint gently guides the solver toward thinking about something that arrives from space without explicitly naming it, while keeping the tone playful and engaging."

The clue "What arrives in the film 'Arrival'" leads to the answer "UFO" through a straightforward reference to the plot of the 2016 science fiction film Arrival. In the movie, extraterrestrial spacecraft (commonly referred to as UFOs—Unidentified Flying Objects) land on Earth, prompting humanity to decipher their language and intentions.