I'm a bit late, but... Between 'PINK FLOYD'S THE WALL' and 'TARZAN', I'd love it for Adam to do 'The Wall'; but I'm actually a fan of some of Phil Collins work as well, so I'm happy enough about Tarzan. The story is just okay, but the design and choreography could be interesting, so as a whole it still could be an interesting piece of theatre. And, as I said, I did enjoy Phil Collins songs and Mark Mancina's score in the movie.
That said, I am also someone who would be willing to see a bad show for a performer I think highly of, because often times the performance itself is worth hearing, no matter what the material is like. I'd probably try not to pay full price, though.