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!