I read that the new weapons that were datamined are named after Frost, Unholy, Blood and Fire.
https://www.wowhead.com/news=295682/...n-blade-swords
Now it's clear that the Allied Race and Pandaren Death Knight skins together with the new map of ICC strongly point toward Allied Races and Pandaren being able to be Death Knights, a new story development around the current Lich King and a new starter area to depict that story.
Those weapons are most likely the weapons that new Death Knight characters will get in the starting area, similar to the weapons we got at the end of the original starter area, after we fought the Lich King.
Now the weapons are clearly themed after the 3 specs, plus fire. This strongly hints at Fire being a 4th spec in the next expansion, possibly due to Bolvar's connection to fire.
I'm calling it now, we are getting 4th specs in the next expansion. Hopefully Druid will get a 5th one.