In the latest 8.3 PTR build, there were some interesting items datamined. Four new 2h Weapons, specific to Death Knights, all at item level 58.
- Unholy Blade of the Ebon Blade
- Crimson Blade of the Ebon Blade
- Burning Blade of the Ebon Blade
- Freezing Blade of the Ebon Blade
From these items, it's easy to extrapolate a few things.
Firstly, there's likely at least a minor rework for the DK starting area. We also had datamined NPC models for Allied Race DKs, so likely at least something relevant to that. For that to make sense, however, many parts of the starting area would have to be reworked for it to evidence Bolvar as the Lich King rather than Arthas.
Secondly, the Freezing (Frost) Variant for this weapon is 2H.
This is confusing to me as this is 8.3. Even if they intended to make Frost playable as 2H again, they wouldn't do it in the last patch, but rather wait til the 9.0 pre-patch.
Thirdly, there's a fourth weapon (even though the three DK specs are accounted for). "Burning Blade of the Ebon Blade". There's two possible reasons. First is the most obvious. It's handed to you by Bolvar himself, the man on fire. The dragon fire surrounding him has permanently lit the blade on fire.
The next possible reason is a bit of a stretch: possible Fire spec for DKs.
It's anti-typical of DKs to have a fire spec, but with Bolvar as Lich King, technically possible?
Either way, new datamines are weird.