https://comicbook.com/blog/2014/02/02/superman-returns-director-bryan-singer-explains-why-he-didnt-cast-henry-cavill/

https://www.comicbookmovie.com/superman/bryan-singer-would-have-done-man-of-steel-a-little-differently-reveals-why-he-didnt-cast-henry-cavill-in-superman-returns-a93812#P2dMYRkgGDAWL7hs.99

https://variety.com/2006/film/markets-festivals/uta-signs-man-of-steel-1117936596/

https://toofab.com/2014/05/14/bryan-singer-x-men-brandon-routh-casting-couch/