Lol, some of these designs are cool, but many of them are just completely off the wall or dirivitive of popular animes of the time. I can visualize the conversation amongst the dev team now.
Boss: Let's see the concept art for the characters of our new game, King of Fighters
Workers: Here it is!
Boss: Most of these are unuseable. You'll need to start again from scratch.
Workers: We're not going to meet the deadline.
Boss: Keep moving forward, we need to get this out! Just put in characters from our existing games!
It’s always awesome to see concept art of your favorite games to get an idea of what could have been if they stuck to these designs and ideas. I think it was a great idea to get characters from different games with some original characters to KOF and it came out perfect