I've got my own Kunio side project going that I've mentioned here and there. The goal being to localize the titles while trying to remain faithful to the Japanese. I've hacked the title screens for Nekketsu Kouha Kunio, Nekketsu Dodgeball and Downtown Nekketsu Monogatari. I also have a mockup for this game which I've yet to actually hack in, but I'll get to it. I also have a new translation for the game which I'll eventually get around to hacking in.
Naturally, King of the Streets is a bit of a stretch, but I believe it's also the name of the tournament and I wanted something that sounds cool. Plus the title works with the animation where the logo is split up into 4 parts.