In my mind, that final moment in Game of Thrones S08E03 between Bran and the Night King was an indication of what was to come.
It took me a while to understand why the Night King tilts his head after Bran breaks eye contact with him. I think Bran knows Theon must charge the Night King in order to make Bran look unprotected. Bran brings him right in and since Arya can easily walk around dead people without being noticed, I think he sees her walk up and jump.
Anyone else have any thoughts? I just can't figure out why he tilts his head at Bran.