Would've been better if it wasn't actually Volgin. Man on Fire having a physical form kinda takes it away for me. Sure it is cool that he can absorb bullets and ride a flaming unicorn but I kinda wish his appearances were related to Venom's hallucinations coming to life through kid mantis. Something like a manifestation of Big Boss's past which he can't run away from instead of Volgin coming to take revenge.
I just don't see Volgin as someone coming after for revenge. He's like the most goofiest villains in the entire series lol.
Would make sense as its not the real boss so he wouldnt have memories of Volgin and plus if i recall he doesnt know he's 'big boss' yet. But yesh the fire thing was dumb for volgin, but electricity would have made it way to ovious it was volgin