Well MMO Champion is my favourite site today Tier 10 information has been released for all classes here:
http://www.mmo-champion.com/news-2/patch-3-3-ptr-build-10554/

Druid T10 Restoration 2P Bonus
The healing granted by your Wild Growth spell reduces 0% less over time.

Druid T10 Restoration 4P Bonus (Rejuvenation)
Each time your Rejuvenation spell heals a target, it has a 2% chance to jump to a new target at full duration.

Added Pic, I think I like…

Have to say wow, I really like these set bonuses! Wild Growth is already a very powerful tool but to have a 0% reduction over time is great!

Rejuvination change could be interesting, 2% is pretty low but if you take into consideration the number of ticks going off on multple targets I would expect this to be proc’ing pretty regularly!

Having a good day (although I didnt sleep last night haha)

Updated: added funny photo