I'm ripping the music from RRR for Xbox 360 now and to my surprise, I found out they still have sounds from the prototype in there. I haven't deciphered the format yet but I'm close, and I found some familiar sounds like the lum-collecting sound from Rayman 2, and eagle cry and eagle wing flap sounds (according to the filenames and to what I heard). Oh, and sounds from sharks and T-rexes. More importantly, it also seems to contain MUSIC from the prototype, which would be quite awesome to hear.
I don't remember any spider in RRR, though the filenames clearly say: "Spider_theme1.wam" ("wam" files are music), "Spider_jingle1.wam", "Rayman_death1.wam", "Ptizetre_incantation1.wam" (Teensie spell?), "Ptizetre_release1.wam", and lots of other files with just "test" as a filename, which weren't in any of the other versions.
It looks like I might be in for a goldmine of R4 Prototype stuff when I find out how I can convert this!
EDIT -> Converted the music, it's definitely not in the final game but it's pretty disappointing as it's not very good. The Teensie music is taken straight from Rayman 2.








