I don't believe you appreciate the whole idea behind this...
Opera is not one genre. It is a complexe interpretation of music. It's a pure form. And a very complexe one at that. Think classical music multiplied by 100. If they do pull it well, and they do try to go through the whole range of what can be done though opera, then you will not miss the nice guitar or electronica, since it will not be needed.
Think of classical music. It is not one genre, it is a family of may subsets, like Baroque, Rhapsody, or Sonatas. But all of these genres find their full nature through proper interpretation, like a full orchestra with an opera singer.
I'll have to look up some of the guy's work, so that I have a better idea how he will sound, but I assure you, you will never be disapointed by something of that level.
[EDIT= Ok, you got me, I'm a fan of opera and of powerful interpretations...]
[Edit2=Yeah, my bad, I realise that only the main theme would be with the latin lyrics... I have to say, it's almost disapointing...]