I've always wanted to see a full brickfilm musical. In fact I have made some (unsuccessful) efforts to convert a script of my own to a musical in the past.

However I have to say I'd be surprised (but pleasantly) if you found someone here with the technical abilities and motivation to want to animate the whole of Les Miserables in LEGO.

Perhaps you should consider working with an animator here to create an original musical brickfilm. If well done it could turn out to be a masterpiece!

Musicals are definitely an under-explored genre in Brickfilming, so I'd be interested in seeing what could be accomplished in this regard.  LEGO by its nature is already somewhat cartoony and stylised, so conceptually I could see this sort of thing synergising well together.

In regards to Les Mis itself, though, I could see something like this getting into trouble with copyright very quickly, as I'm pretty sure the songs and characters are still copyrighted (although I imagine the novel itself is public domain by now).  It'd be a shame to have that happen, considering the amount of coordination and effort a project like this would require.  Speaking of which--I don't think it would be possible to re-create the entirety of Les Miserables in as a Brickfilm, awesome as that would be.  You'd either need a huge amount of time and money, or enough people to put this on the level of a community project (which are notorious for falling apart and not ever getting completed, due to various members lacking time/interest).  Something like a 10-minute short would be much more achievable while still being considerably ambitious, but even that would only be long enough to fit in 2-3 songs back-to-back of a feature-length musical such as Les Mis.

In general, however, I'd love to see a Brickfilm musical happen in one way or another, and I do think it would be possible to make something, even if it's comparatively small in scope.