Yeah, the 'bettering themselves on the genre' is misleading to me also. Rocky touched on a lot that I wanted to say, except that Guilty Gear series is made by Arc System Works, not Sammy.

And if you're going to talk about that, talk about BlazBlue, which was recently released. And also KOFXII, and SFIV and such. The essay could be so much more in depth and longer if you added in the new stuff as well.

But yeah. Balance your information for Capcom and SNK. Also, you failed to mention Darkstalkers too. and Marvel vs Capcom 2.