Unlike a musical like West Side, Nevsky presents challenges of long stretches of no music whatsoever and the dialogue is still dicey in sections. The movie was itself key in bringing back the lost art of live orchestra playing under a film.
When I first saw Bondarchuk's "War and Peace," in 1968, in New York, it was presented in two parts and ran six hours. You went in the afternoon, broke for dinner, then came back for the rest. It was stupendous.