> What if in the whole next movie ("Harry Potter and the Half-Blood
> Prince") we'll not hear the Harry Potter theme (by John Williams)
> even for a second and in the 7th movie the Harry Potter theme will be back
> with all his glory (and, hopefully, with John as the composer...)?

> I think it's a great and revolutionary idea. What do you think?!

We've had Bond movies without the Bond Theme, Godzilla movies without the Godzilla March, and Star Trek without the Star Trek Theme ... and neither of them did very well, to say the least.
Based on Hooper's Order Of The Phoenix, Half-Blood Prince will be lifeless enough, even with Hedwig's Theme.