Captain Obvious Reveal: "Locksley," a brilliant shot with a bow who leads a merry band of outlaws in Sherwood forest, is revealed to be the secret identity of... none other than Robin Hood! All right, maybe it wasn't originally quite as much of a Captain Obvious Reveal as it is today, because Scott invented several of the tropes that became stock parts of the Robin Hood legend. Still, any reader with even the tiniest familiarity with the genre must have seen it coming a mile away.
Die for Our Ship: Rowena. William Makepeace Thackeray's highly inaccurate description says it all:
William Makepeace Thackeray: And must the Disinherited Knight ... sit down contented for life by the side of such a frigid piece of propriety as that icy, faultless, prim, niminy-piminy Rowena?
Fair for Its Day: Isaac of York, though a stereotypical Greedy Jew, is nevertheless depicted as grateful toward Ivanhoe and his adherents, and devoted to his daughter — while Rebecca is downright saintly.
Sir Walter Scott: [in his 1830 Introduction] The character of the fair Jewess found so much favour in the eyes of some fair readers, that the writer was censured, because, when arranging the fates of the characters of the drama, he had not assigned the hand of Wilfred to Rebecca, rather than the less interesting Rowena.
It Was His Sled: Today's readers aren't going to be fooled for a second when the mysterious Forest Ranger gives his name as "Locksley". However, Scott's readers would have been kept in the dark, considering Scott was the first author to link Robin Hood's name with the word "Locksley".
Older Than They Think: Scott is sometimes credited with having transferred Robin Hood to the time of Richard The Lion Heart — but in reality he was adopting a tradition that dated back to Scottish historian John Major in early Tudor times and was firmly held by Joseph Ritson, the author of the most influential study of the Robin Hood legend in Scott's own time.
Values Resonance: Both Rebecca and Isaac are treated sympathetically, and crucially Scott doesn't have Rebecca convert at the end so that she can marry Ivanhoe or stay in England, showing her Jewish faith is just as important and integral to her as the faith of the Christian characters.
The Woobie: Various characters at various points in the novel — but Isaac fulfils this role fairly consistently, being a moneylender who can do little to defend himself or his family against the Norman robber barons.
Early in the film there is a moment where Rowena enters the dining hall and Isaac is the only one to stand. Later when Bois-Guilbert has escaped Torquilstone with Rebecca, Rowena can be seen comforting a saddened Isaac.
Rowena and Rebecca's interactions. They confront each other over Ivanhoe (literally they are standing right over him) at Ashby but quickly realize that they should be helping him instead of wasting time in arguments. They are nothing but friendly with each other later on. Later, Rowena tells Ivanhoe that she will respect his choice if he loves Rebecca.
Germans Love David Hasselhoff: For some reason, Ivanhoe has become the New Year's Day hangover movie of choice in Sweden, being shown on TV every year for over 30 years in a row. Much to the consternation of its stars.