Found a nice little scoop over at World of Raids:
http://www.worldofraids.com/forum/viewtopic.php?t=1702
It appears that while trawling through some of the new item models they've come across a load of recoloured Tier 2 sets. Speculation is running rampant as to what the purpose of the colour changes are, all i can really say is:
/cheer for red wrath
/pat for all you mages out there
ps: if anyone tries to tell me colour is spelt wrong i'll slap you!