Arreat Summit has released two new screenshots from 1.10, a new Assassin skill system and new monster in World Stone Keep:
The first picture is showing how Phoenix Strike is getting attack bonus from other skills. You can stack bonus damage from other skills even if you dont use it.
This Assassin is using a full Natalya's Odium set, nice looking transparent/etheral effect. And we got some new monster, a Sand Raider which are usullly in Act 2 only, has travelled to Act 5 and also a Sand Magus. There are surely new enemies everywhere now.