I cn see potential, but a few suggestions:
1. Needs bulkier upper body
2. Batarang in right hand ready to be thrown
3. Do something with that left arm. Hold it out for balance (would make sense if Batarang), have it throwing back the cape, extend it out and place the left hand on the top brick to add to the movement of the figure, just have it do something of purpose
4. Flatten the bat symbol and perhaps give it a different finish
Of course if you don't like this costume tweaking might not matter matter, but it'd be cool if this and SS's version were both great and provided us with some variety.