If reforging Frostmourne into two 1-Handers is no problem lorewise, making a 2-hander is as much of an issue.
It's all as said, Blizz wants Frostmourne for frost and also wants frost to be DW.
Maw of the dawned is the sickest looking artifact with a scythe version.
Why would it have to be Frostmourne? lol As long as the artifacts look awesome like the ones for Frost then it's fine.
Realistically speaking, it's pretty hard to reforged a weapon that was destroyed into the exact same one but everyone knows that's not the real reason.
He was mostly a Frost DK though. Lived in a Throne of Ice, Used tons of Ice Based Moves, raised Frostwyrms, had Frostmourne, in Halls of Reflection caused a Ice Storm around himself. Defile/Raising the dead are really the only Unholy DK things he did.
If any of the 3 specs of DK had a "fragment of Frostmourne" weapon, it would be Frost.
Blizz' reasoning:
Frostmourne only suits frost spec - it's in the name, it's all frosty.
2H frost is dying, they needed a way to make Frostmourne fit DW - hence the "reforging into two blades" thing.
Every spec is getting a unique weapon, and yes - that means they're going to be making up some lore.
If Unholy and Blood also got frostmourne people would cry "zomg lazy, we're not even getting a new class hall and now we're only getting Frostmourne for each spec?"
...In the end we're not getting THE 2H Frostmourne, but we're getting a DW variant that's as close as possible. I'm not altogether happy that everything seems to be skull themed (I don't see how shadow/fire/lightning versions of Ashbringer fits "lore" or whatever so why do DKs need to be all shadowy/frosty skulls?) but it is what it is.
I'll just transmog that shit and be done with it.
I would assume because lore wise it's a frost dk that takes the shards. If you used the shards as a frost dk, how would you forge a weapon for blood from those shards?
He wasn't any "spec" - he was a lich-king-enhanced dead paladin, lovingly called a death knight by his boss and his cohorts/allies.
He used every bit of power he had; Blood is really the only "tree" he didn't touch on in WC3 or the Arthas book. He used frost abilities a lot - he froze a whole big ass river in Quel'thalas to get his army through, and he often tapped the frozen nature of his sword when he fought.
He was a death knight, plain and simple - he wasn't really one way or the other; he used every power he had on his way to the throne, and once he became the full-blown lich king, he controlled and raised a gigantic army of the undead, stole souls, sapped life, froze people, froze terrain, called up frost wyrms, and the list goes on.
Also, to the original post's question - remember that the original Frostmourne was a truly ancient, old-as-it-gets weapon forged in THE HEART OF THE NETHER by the Nathrezim; the shards in Legion will surely be powerful, but they're no longer a single blade sealed by Nathrezim forging - so it just can't be Frostmourne - it's going to be re-forged in a magical forge and anvil set-up for sure, and probably by someone (Darion or the player maybe?) of immense skill, but again, no matter who it is, it's not an ancient nathrezim master in the heart of the twisting nether, so it's going to be inferior if it's compared to Frostmourne.
Remember, Frostmourne is more or less the second-most powerful weapon we know of - it was a superior weapon to even Felo'melorn, I'd argue more or less that only the remnants of Sargeras' big ass sword are more powerful among things we've encountered, and maybe Illidan's warglaives are close, since they are also legion-forged weapons, possibly made by Nathrezim smiths. The light/naaru-enhanced Ashbringer was also Frostmourne's equal but I can't say if it was the power of the sword, or the power of the man that was light-swelled at the moment Tirion breaks Frostmourne and makes Arthas vulnerable.
Either way, I'm mildly annoyed about the death of 2H Frost because I personally just don't think the Death Knight is a dual-wield class; Thassarian is the only example we have, and he's not exactly a superb character. The DK in both old ass WC (no bearing on our DKs because we're a different model from a different era with a different creator - sort of) and WC3 use a single large weapon. That said, I'd be perfectly ok with it if they compensated by either making Unholy less reliant for its damage on the stupid ghoul or by giving me back Blood DPS - I think Gladiator stance, had it been successful, would've probably paved the way for Blood to come back as a DPS or Tank option, but it looks like Glad stance was sort of a failed experiment so I am guessing ol' Blood DPS won't see a night out any time soon.
Signature dunked by a lame MMO Champ robot.
Always hated how Frostmourne went. This asshole who didn't help at all during the fight jumps out and breaks it because he is just so holy? Just doesn't sit well.
Either way, I'm hoping they do the sword justice with its story and it continues to hold some of its 'evil' flair. I know a lot of people are saying that Frostmourne is known to consume one's soul and command said person for evil purposes but I've never really though of DK's as good people either.
We may help when it calls for it but in the end, are we good?
That isn't the evolved version, it looks like it, but that is most likely the last model we get, look at the handles top, its different from the 2nd evolved version, also the skull is longer and looks pretty much exactly like frostmournes. The blade is also longer, and the horns on the ram are pointed and curled, unlike the 2nd evolved version where they are cut off by ice and more square, IMO that sword is exactly what I want, looks like fucking frostmourne....now only if it was a 2 hander : (
Frostmourne is pretty much the opposite of the Ashbringer.
Paladins are getting the Ashbringer.
I don't see an issue. Or rather, if there is any issue, it only really comes down to which spec would get it.
Raising the dead and leading an entire continent of undead creatures... which is the reason Bolvar had to take up the crown, or the undead would run rampant. It wasn't the cold that were going to kill everyone, it was the undead, the whole undead legion that he was controlling.
He was definitely not most a Frost DK, as being the leader of the undead was his first and foremost trait and strength.