With more than 250 art fairs occurring every year around the world, the pressure for each fair to differentiate itself is high. The key to success for Art Brussels is often found in elements of surprise and discovery. This year, more than 20 of the 145 participating galleries are making their debut, establishing plenty of room for experimentation and newcomers. Even at the more seasoned galleries’s booths, however, many staple art fair artists are missing or in low supply: only one booth is showing Michelangelo Pistoletto; just two have works by Marina Abramovič?; we didn’t see a single Koons, Kusama, Murakami, or Muniz; and we only saw three Ai Weiwei‘s and one Paul McCarthy.