I think its a story of two true loves.
Legolas knows Tauriels' pfeelings for
Kili. As shown in the seen lakeside after Smaugs death. But never wavers in his attitude toward her. And attitude of duty first but a definite affection+ underneath. Without the expectation. No. The realization that her heart wasnt his. Along with the classical romance of
Tauriel and Kili. Two true romances.
*Mumble, grumble*
OK, being very generous, one could see it as a dim, late echo of "
Beren and
Lúthien". With Legolas (also non-existent in the original "The
Hobbit" book) taking the part of the (as originally in the "Book of Lost
Tales" phase) Daeron.
But Beren and Lúthien are of the "Eruhini", what the
Dwarves (despite a thread to be found somewhere here on the site) are not.
The only
Dwarf in PJ-ville whose appearance ever came close to JRRT's vision of Dwarves was
Gimli as portrayed by John Rhys-Davies. And PJ threw that out the window by making Gimli the source of much comic relief in the LoTR films (I've raged about this elsewhere, not only on TTF).
The only Dwarf who vaguely comes close to Gimli in LoTR in TH is
Balin. The rest are (in varying degrees) bad jokes.
Thorin,
Fili and Kili with their Don-Johnson-stubble as heirs of
Durin I, longfather of the
Longbeards (!!!) are just ridiculous. The Hollywood
Troll in PJ seems to have thought that Orlando Bloom (the candy for a specific demographic), having aged in real life (duh! Lee Pace, playing his father
Thranduil, is actually younger than Orlando; did a good job of covering up that real-life contradiction), needed backing support by Dwarves totally contradicting JRRT canon. The EE additional footage to the actual film (not the "appendices") with the Dwarves made me 🤮