Gonk, here's how next gen codecs break down by the "big" studios in HD/BD:

Universal: Mostly 24-bit Dolby Plus, a few Dolby TrueHD. Seem to going with TrueHD more and more.
Fox: Every release has DTS-HD Master Audio. Most are 24-bit.
Warner: Mostly 16-bit Dolby Plus, a few Dolby TrueHD.
Lionsgate: Some multi-channel LPCM, some DTS-HD.
Disney: Pretty sure all releases have multi-channel LPCM.
Weinstein: Mostly 24-bit Dolby Plus, a few Dolby TrueHD.
Paramount: Mostly 24-bit Dolby Plus, a few Dolby TrueHD.
Sony: All releases have multi-channel LPCM, some Dolby TrueHD, seem to be moving towards TrueHD.