This has the potential to be a fantastic project. I think it's very unlikely we will get modern remixes because looking at the sequence, the remixes would seem out of place when you have unreleased original songs closing the album. If we add Carousel, Hot Street, Nightline, and Got The Hots to what we have right now, it will look something like this:
1. Hot Street
2. Nightline
3. Carousel
4. Got The Hots
5. Behind The Mask
6. Unknown
7. The Toy
8. Unknown
9. Unknown
10. She's Trouble
The last 3 songs are a guessing game, but if you look at the digital edition it leaves some clues. For All Time and The Girl Is Mine (Demo) are not included. I doubt For All Time will be on here because it simply doesn't make any sense when it isn't even a Thriller outtake to begin with. The best-case scenario is that we could see 2 more brand new songs on this disc if The Girl Is Mine is not included, but I believe the 3 songs likely to fill up this disc are:
Starlight - I think this is a given.
The Girl Is Mine (Demo) - due to the fact this isn't on the digital edition.
A brand-new song from the Thriller sessions that we haven't heard yet.
Slapstick is the wild card here. This song could be included, but if I were The Estate or Sony's A&R I'd push Hot Street as the single to Thriller 40 and I'd put out a digital release of the song with Slapstick as the b-side...so you'd get the demo to Hot Street as a bonus song that isn't on the project...and so that we'd get more music.