Would love to see an Eldar Harlequins mod. Sadly though, they have never added too much to their army. Looking at the Games Workshop site where they show some "beta" rules for an army of them only contains 7 units. 2 Characters, and 2 of the units are actually Minor Characters. Hopefully someday soon they will come out with a Harlequin Codex that would elaborate on this cool army and gives us a chance to make a Mod for them. So what does everyone else think, wait for a Codex or new models, or should we attempt to come up with our own just to complete them for a Mod? Using variations of the units they have now, could possibly allow it but just not sure.
I guess deep down I know its impossible without containing cheesey units of our own design, but I can dream that one day they will try to complete at least an army list and concept art if not models.