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.
*Update*
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".
*Update 2*
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.