Why Is Henry Cavill Not Returning as Superman?

In what is surely not a coincidence, James Gunn tweeted about his decision around the exact same time Henry Cavill posted his announcement to Instagram.

“Peter and I have a DC slate ready to go, which we couldn’t be more over-the-moon about,” James said. He teased that more information will come in the new year.

James then added, “Among those on the slate is Superman. In the initial stages, our story will be focusing on an earlier part of Superman’s life, so the character will not be played by Henry Cavill.”

Source: https://www.distractify.com/p/why-is-henry-cavill-not-returning-as-superman