Here's some new Dark Souls 3 gameplay footage from the FROM livestream. From what we can gather, it looks like Dark Souls 3 has a new dodge system that uses both stamina and mana, a new durability system for weapons & armor, and a UI that is more similar to Dark Souls 2.
It seems like FROM is putting in all the best gameplay aspects of Dark Souls 1 and Dark Souls 2. Also noteworthy is that the graphics and areas resemble Bloodborne over the previous souls games.
Dark Souls 3 is scheduled to launch April 12, 2016 worldwide on PlayStation 4, Xbox One and PC.