Legendary "vanity" gear

I have heard PVP players mention that they hope alliance wars never gets implimented because they are using mix match alliance vanity. Using some of the alliance gear models but throwing some legendary "black" in as another incentive to play pvp sparta would be great. This would allow alliance wars to be implimented without much negative effect on pvp players "looks" this could also create a market the pvp players could use to get coin by selling the pieces to pve players that are not interested in grinding sparta.