I'm so thrilled that Williams seems genuinely excited to do this! Williams isn't a "collaborative" composer, for many -and very good- reasons: -Williams is a composer first and film composer second; there is an artistic integrity, core and soul to his work that would be lost were he to collaborate with anyone. I'm sure such a prospect would seem very uncomfortable (and uninteresting) to him. -His skill and expertise (I will refrain from mentioning talent) is presently unmatched (in Hollywood) to such an extent that unless someone were to bring an entirely different (non-classical, non-orchestral) approach, there wouldn't be room for any real contribution; all anyone could offer would really be a diminishing of quality. And I'm sure JJ Abrams and Michael Giacchino know this very well. There is a reason why Williams is such a revered figure in Hollywood. And a reason why Giacchino responded not as a colleague, not as a competitor, but as a fan.