As interesting as Whedon's involvement is, the bulk of the film is still Snyder and Terrio's. Besides, I thought his work on Avengers was very hit and miss (not a fan of Avengers 1). The trailers haven't done anything for me, and I'll be very surprised if the film doesn't end up being Frankenstein hodgepodge disaster of a movie.
The site ddddeeee quoted is accurate. The runner of h-z.com has close ties to Zimmer and Co. and regularly posts info about what went down behind the scenes, as well as the composer credits for who worked on each cue.
I've said this many times before in this thread, but all of the thematic material of BvS was Zimmer's (Beautiful Lie, Lex, WW, Batman). The only theme Junkie was involved with was Batman, and that was maybe 10% at most; 90% of Batman's theme was still Zimmer.
Junkie's main responsibility was the action stuff (Do You Bleed, Fight Night, Black and Blue). Even if you didn't have the composer credits, you could tell because it sounds almost exactly like his work on Mad Max.
So while I'm still a little bummed we won't get the direct continuation of sound from MoS and BvS that Junkie would have provided, the main thematic voice of the DCEU was never going to be involved anyways, so it's no big loss to me.
