I recently received a digital copy of a Metroid Prime prototype for the Gamecube. Judging by the size and how little files there are, this appears to be a very early beta, maybe even alpha. there is even different music after opening it up with GCE and listening to it in VGMstream. I don't have a Wii to play backups, so this is the best I can do. Dolphin gives me a black screen.
I'm debating what I should do with it; PM me if you are interested for whatever reason. I'm not saying I'm accepting offers for this, but I'm open while I'm contemplating on what I should do with this. I'd give a music file for proof, but I'd be foolish to do so. All I know about it is that the .gcm file is called "DOL-GM8-USA", and I don't have a dumped copy to compare between my two US version copies. The file is 468MB.
I've released stuff before, but this is a Nintendo/Retro Studios Prototype.
I will work on getting access to a Wii with a backup loading application soon. Until then -Cheers.