Inspired by @mabelgreysmoke's post about what boss music would play if you fought her Korpsona, here's some possibilities of what'd play when you fight Proton in a boss fight.
I say possibilities because there are... Contexts to fighting Proton.
if it's just a sparring match, or a In Good Faith superhero scrap, it would be something like this.
But if you're facing Proton after you've properly pissed him off, then it's probably gonna be something more like this -