Lego Batman Figures In Picture Unknown? Please Help
First off let me apologize for fueling your future addiction to Batman LEGO minifigures.

Bricklink finds me 211 minifigures searching for "batman"

https://www.bricklink.com/v2/search.page?q=batman#T=M

Many of these are related characters and not Batman himself, but there are a lot of Batman minifigures, including some really odd ones:






I can also confirm that some of the ones shown in your picture are not Batman and are assembled incorrectly, the middle far right figure appears to be a Nightwing body with a different head and an added cape and batman cowl (original Nightwing shown below), also upper right is clearly superman wearing a bat cowl, if the picture was better you could tell it was dark blue and not black.