Of course they ranked Batman #1, because they only know the DCEU/DCAU. Reason why Val Armorr not only isn't #1, but isn't even mentioned. Because really, he can basically do anything the plot requires and say "I know a martial arts for that". Hell, if he ran into a Stand User from JoJo, he'd probably know an alien martial art that allows him to not only see Stands, but hit them as well.