This tune sounds okay, though I wouldn't quite place it in the category of "badass"...just yet.
I don't own that many fighting games, but I will say that it'd be nice to include elements from the music of fighting (not just versus) games of the SNES and Dreamcast. At this time this song sounds very closely related to your RPG works, than anything else, tbh.
Some songs I'd recommend giving a listen are: "Exciter" from Dead or Alive 2, "Eye to Eye, Blade to Blade" from Soul Calibur, "Avalon Is." from Power Stone, and "Stage 1" from Battletoads Double Dragon
For "Exciter" focus on the electric guitar(s) and the solo breaks. For a tough-guy militaristic style hear the percussion and horns of "Eye to Eye, Blade to Blade". The darkness in tone of "Avalon Is." can also be good in "baddassery" or for a good final fight (take note of that choir,wow), maybe. For a more classic yet awesome feel, take note of the heavy reverb and synthesizer keyboard [solo], as well as the hard bass plucks of Battletoads & Double Dragon first stage. There could be other elements you may want to pick from here, that I haven't listed, and that's fine too.
I think if anything, maybe start out with a strong, cutthroat guitar riff intro, that will give the message that this song's is all about (as Reggie Fils-Aime put it) kicking ass and taking names.
Don't hold back!
-FTA