IAmSinistar: You've got a sale here GOG, whenever it arrives. Hopefully the version we get will be the solid one with all the extras.
HypersomniacLive: Highly doubt it for two reasons:
1. Austin Wintory retained the rights to his music and is selling the album on Bandcamp.
2. A Deluxe version elsewhere or at least on Steam means that devs/ pubs price and sell everything separately, so you can be sure GOG will offer the base version in order to keep the price at the lowest possible level.
It's quite rare these days that newer games come with nice and worthy extras.
Well frack me sideways. Ain't it the way of the world these days.