Avid Have updated their website documentation to include the upcoming features in Pro Tools 12.7
Most notable are:
• Find the right loops, samples, and sound effects fast with SoundBase
• Get inspired and wake up your mixes with a high-quality loop library from Loopmasters
• Try out and share new ideas, with Project Revisions keeping track of all files and changes for you
The full details can be viewed on two documents located here , Clicking "Whats New in Pro Tools " under Guides and Docs and the "Pro Tools Datasheet" under Datasheets will give you the full rundown.
It looks like Avid have diverted the links to those documents so perhaps their publication was a little premature, however the datasheet can still be accessed here...."for now".
The "Whats New" document is back with 12.7 details after being reverted to the 12.6 version but the "datasheet link is still dead, my direct link (posted in update 1 above) is still working though.