Well, according to the site, it’s the The Sideshow Collectibles Design and Development Team:
Bernardo Esquivel (Paint)
Andy Bergholtz (Sculpt)
Martin Canale and Gore Group Studios (Sculpt)
Tim Hanson (Costume Fabrication)
Kristafer Anka (Design)
My first though was also Kingdom Come Superman, but younger and in a traditional costume. Alex Ross did do a JLA miniseries from 2005-07 called Justice. Superman wears the traditional costume in that; however, the action figure based on that miniseries has a larger S shield and a different fit to the cape. I can’t find any good shots of the comic book to see if that figure is that accurate to the comic or not.
Superman’s fighting Darkseid in some of the statue’s photos. I don’t know if that can be a hint or not.
I’d still bet that “none” is the answer to the question, though.