This is more of a bronze age take. Yes, the official (so most commonly viewed) depiction is the model sheet from José Luis García-López - and yes, Garcia- Lopez could and did draw a buff Supes:
And even if we go with the classic decades long Curt Swan (or Swan/Murphy Anderson depiction)
version, yes, did have some musculature.
But this wasn’t the Ed McGuinness style or the often depicted and described as house style where even folks like Hal and Barry are shown with body builder physiques, so ‘pretty massive’ is far more of a modern (past 1990s) take.
And the problem is that now DISCO wants every DC story to be, predominantly, theatrical and now don’t want to approve something for theatrical release (with streaming no longer really being an option for DC Comics story-telling, apparently ) unless they feel it’s going to make multiples of hundreds of million in gross earnings back. Or someone else will pay for it (e.g. letting Prime push out those new Batman animation stuff, allowing Superman and Lois to exist for another year, but no longer, allowing Sandman to exist while Netflix will underwrite it, etc.)
Personally, as to the point of this thread, it’s interesting that you picked up on Coronswet in 2019 and he did turn out to be the one cast. As far as physique, apparently he has been working out - or was apparently putting on weight, or so it appeared in public - when he was photographed a month or more back out shopping.
I personally would have liked to have seen a second solo movie from Henry, and I wouldn’t object if five or ten years down the line, we get a live action adaptation of say Superman Secret Identity, where Henry gets CGI deaged the way Harrison Ford did to play the ten minutes or so of screen time of teenage Clark Kent in that story, and slightly less deaged to play another ten to twenty minutes of adult Clark Kent, dating and marrying his adult Lois, intermixed with action and then the last third be his actual then age to play the prime Superman with his twin daughters. Or something else that could use multiple, generational takes and be a good slice of life elseworld story, a decade plus remove from the dreck that was the Snyderverse and even some years removed from whatever Gunn is doing.
I enjoyed what Routh got the chance to do in the DCW’s Crisis cross-over and (while I would much rather see Routh be given a proper live action follow-up in the next few years while he can still get in shape and wear that Kingdom Come suit), I would definitely enjoy seeing Henry get that as well, eventually.
It’s just fun to discuss just like fan theories. It’s just funny that Men’s Health picked up the story after Henry gave them the quote about not having put away his cape yet.
