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.

http://www.battle.net/diablo2exp/ima...assassin02.jpg

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.

http://www.battle.net/diablo2exp/ima...assassin01.jpg