The devs told us that they are planning to introduce new sets in patch 1.0.0.6 . What are you ideas for those sets, guys? What builds in your opinion still don’t have sets designed for them?
I think that melee poison-acid character needs one set for sure. Currently there’s no set for poison-acid melee builds. You have just separate items like Nidalla’s Legs and boots, Venom gloves. And those items lacks resistances! Only poison resistance lol )) No helm, no shoulders, no belts designed specifically for an acid poison melee (Witch Hunter).
I would really love to see more items / sets with conversion of damage types, those offer up so many possibilities.
Other than that I think something with aether other than casting equipment would be nice, if you want to create some aether non caster you are far too dependent on green stuff.
look at that thread for new infos/guesses
it suggests that one of the new items will be the Razor of Venomblade, so it seems you will be exhauced 
I hope it is a part of a set 
Btw, why belts can’t be set items? Maybe it is the engine limitation…
as far as we know, all new items will be part of sets 
and some belts are part of sets (Marauder’s Ammo Belt at least)
My memory failed me again But no legendary set belts as far as I remember?
Wildblood Vanguard has a Legendary Belt.