In fact, I liked the final result so much that I made myself a plaque in the shape of the shelf to hang on my wall, as a tribute.
large piece of 3/4" plywood
dry wall screws
Step 1: Draft it out
I found a picture of the symbol online, photoshopped it, blew it up to scale, and printed it out on multiple pieces of paper, and taped them together, and then taped that to the plywood.
(I attached the template that I used)
Step 2: Cut it out.
Take care to cut around the bat ear parts, or else one of them can easily be severed.
NOTE: For building the plaque, just cut out one bat symbol, and follow steps 3, 4, and 7.
Step 3: Sand it down.
For the surfaces I used my power sander, using first 120, and then 220 grit.
You have to chose here which bat will be mounted to the wall, and which will be the horizontal shelf part - the horizontal one should be sanded more on the edges because it will be facing people who pass by (Batman wouldn't want anyone to lose an eye...)