Character mistake: Marion tells Robin "he chose you for a reason", despite not previously knowing that Robin was The Hood. So she has no reason to know that John chose Robin.
Robin Hood (2018)
1 character mistake
Directed by: Otto Bathurst
Starring: Jamie Dornan, Taron Egerton, Ben Mendelsohn, Paul Anderson
Factual error: The Third Crusade is continually referred to as being in Arabia against the Arabs. In fact, it was in Palestine (then generally known in Europe as the Holy Land or Outremer) against the Ayyubids, who were mostly of Egyptian, North African and Syrian extraction. Although many would have been what we would today call Arabs, the term was not used for them then - they were generally known in the West as Saracens.