How long do you think the movie would be? The musical is already 2 hours, 45 minutes long. The story would need to be fleshed out even more, possibly new songs added and scenes rearranged. I personally would delete the recitative and use dialog instead. In my vision, it would work better as a movie with arias than as a sung-through film musical. I mean, look at what happened with EVITA and RENT. Movie operas just don't work, in my opinion.
Salve, Regina, Mater misericordiae
Vita, dulcedo, et spes nostra
Salve, Salve Regina
Ad te clamamus exsules filii Eva
Ad te suspiramus, gementes et flentes
O clemens O pia