Outta the classes, the Sniper loooks more like Riddler, not to mention, most of the Batman Villains (Joker, Riddler, Two-Face, etc) generally have a slim, slick, buisness man esque look to them a lot like the Spy.
So we better save the best of these villains(Joker), for the character who best fits his physiche (The Spy) and keep other Villains as other classes (ex.: Two-Face, Alfred, Mr.Freeze, Dolllmaker - Medic; Deadshot, Riddler, Bruce Wayne - Sniper; Alfred, Penguin - Engy; Harley, Firefly - Pyro and so forth)
I'm not saying I won't vote for this one or that this this one isn't cool, or even to waste time making a version for Sniper as the title suggests, but that the Spy's physique is one of importance and considering our oportunities at hand, it should not be wasted