Nice job! I don't necessarily like that particular pic for the cover, since I thought the original Shinkiro portrait of Haoh Maru was excellent, but it is still a very attractive and eye-catching insert. Just one problem, where's Gen-an?! I mean, it is his last game as a playable character. But then, I'm a little biased for that ugly ogre because he's my favorite character out of that series.
One thing I thought might be kinda' neat is offer different types of inserts for games. For example, if you were to do an insert for Fatal Fury 3 let's say, you could have a heroic cover featuring Terry, Joe, Andy, etc. But then, you could have a cheesecake cover with sexy or provocative drawings of Mai and Blue Mary. And of course a villain cover featuring Geese, Yamazaki, Chon Rei and Chon Shu, etc. Mix up art styles too. Maybe have ink brush drawings, life-like renderings, comic book/manga styles, just to keep it all fresh and exciting.
Again, nice job! I'm looking forward to seeing future works!