If there was a film on John L Sullivan, I think the following would happen.

I would expect his great traits such as power and speed to be ignored by modernists anyways who would be baffled by the styles due to ruleset and the fact that the film would be incredibly choppy. The classicists would defend it of course and we'd have a new hypothetical h2her to argue over but the grand scope of this boxing civil war would not change, nor would Sullivan even be a large talking point from the classic side like Marciano, Louis, Dempsey and Benny Leonard

 

I think you are way off with the comparison to Ingemar Johansen.

It seems to be based on a single erroneous assumption, that Sullivan was a primarily right handed fighter.

Everybody who saw Sullivan fight before he broke his left arm in the Cardiff fight, seems to describe him as a two handed hitter.

The things that contemporary observers seen to agree upon, is that he fought from a low crouch, with his weight resting on his front foot.

This combined with his rushing offensive style, suggest that he was much more akin to somebody like Jack Dempsey.

One fighter who was occasionally compared to Sullivan, by those who might have seen both, is Terry McGovern.

This also suggests a come forward swarming fighter.

 

I expect top power to be honest

 

No trolling also ..i think sullivan starches modern heavies today

 

I agree with some of your earlier points but you are hugely off in comparing him to stand up boxers like Coetzee or Ingo. John L was a scientific brawler, or at least scientific for his age. And there is commentary on his use of the left as a jab and a sweeping hook.

I think a Sam Langford, Jack Dempsey agressive rusher type is more apt.