If you look under the professions part of WoWhead, you'll see that crafters get to craft a new tier of PvP armor, that is malevolent. The armor is epic quality, and level 476.
Some of the starting materials is rather low cost, take for example some of the cloth epics only require 6 windwool cloth bolts, crafting plate PvP armor some only require 12 Ghost Iron Bars . The LW crafted gear requires as little as 2 magnificent hide. Using LW route may be profitable if you use the once a day CD and don't have use for hides. But windwool cloth seems to be the most cost effective, while ghost iron bars are fairly cheap too. Not too sure about hides.
To put this into perspective, if they really do DE into Sha Crystals, then we will pretty much see the price of it to collapse, and will collapse the below 100g per Sha crystal part. This will have a huge effect on the high end weapons, and bracer enchants. If PTR does come up to be true, then we would be possible to see the price for to collapse to 1/3rd or 1/4th of today's prices.
For those people who are thinking about stockpiling Sha Crystals, if this comes true the value of those will crash to a fraction of what it once was. To this day getting Sha Crystals, is limited to once a day CD, running LFR to DE loot, running regular raids and DE the loot that's not needed, or buying some cheap leveling BoE epics that can be used at level 87, and its level 440. 5 mans only drop blues, and doing a heroic scenario might give you a epic in the end of that sachet.
If this goes live, then expect a huge flood and price collapse of Sha Crystals as well as the products that's produced from it.