This thread reminded me of that Tekken CGI movie, is it any good?
It's 5% Nina and Anna fighting, 15% original character providing an excuse for the plot, 40% the misadventures of Xiaoyu and Alisa, and the remaining 40% is the Mishima men trying to kill each other.
Nice ending moment from Heihachi. I just have very little tolerance for Alisa, since she looks like someone threw a whole pink shelf of girl toys and a couple of chainsaws into a human-shaped mold and that what came out.
IClearly I'm joking about focal treatment because we should have the same quality writing for all characters. Fighting games and their narratives would be better as a whole if they abandon the idea of a "face of the franchise" character. In Tekken's case a favorite family of the franchise.
Try telling that to a publisher's marketing department. I get what you're saying, but then you get covers like those of big crossover games like Smash Bros and Project X Zone, where there are so many characters it's hard to associate the game with a simple elegant design due to having to cram so many characters in to make sure all get properly noticed.
There are plenty of fighting games that manage to treat their non-main characters with respect and give them independent and valid story arcs. In King of Fighters, for example, you have Kensou working through some issues with his abilities that have been affecting his moves since KoF99, and are likely to be building toward something in a future game, considering all the characters that have been involved in his endings since, and how some of those have clear ties to larger events in the setting.