About the world, about how far Blizzard is with developing d4 and some new ingame/gameplay scenes would be my favourites!
Of course, some news around the class-specialisation and the skilltree would be very interresting too for me.
But arround monster familys and their art progression it would be okay for me to hear nothing about it and find it out later, when i play it. 
okay, its interresting too, because i hope they make it rly dark and horror to scare us just by sawing it.
All news are good news, i hope so.
Greetingz