Great work! In the light of what happened to Kerrigan in the end of SC2 the picture assumes even more special meaning. Would be great to add textures to the barrier between the two Kerrigans but even without those it looks very good anyway .
Without thinking much I can suggest 2 rather typical variants of barrier textures: 1) Water, in this case one of the images (corrupted Kerrigan suits most there) shall look blurred. But this is really cliché, isn't it? Example: [link] 2) Frost, which is actually a variation of the previous option. Blurred effect can be minimized there but the corrupted Kerrigan gotta look faded then. In the process of typing I thought of another option - perhaps somewhat more original and connected with SC universe - mostly transparent corrupted zerg soil with the emphasis on greyish streaks: [link]