Sorry, in my first question I was refering to linkinepi's SoundCloud link (LINKIN PARK - A THOUSAND SUNS DEMOS), but I think you answered it anyway by saying "only Luna and Warm Spell's origins can be confirmed at this point." Thanks.
Confirmed how?
I mean, I know the "donna" thing was used during the MTM sessions, but Ammosick was also on the song board during the ATS sessions. They could have added the vocals/lyrics then.
If the "donna" song is really Ammosick and the first song is really Argonauts, it would make the first song an ATS demo, not a LT demo (Argonauts was also on the song board during the ATS sessions).