Snyder’s original story outlines for JL sequel leaked and it turns out the plan was to have Bruce and Lois have a child.

Snyder's plot outlines

Superman would have been a brainwashed tool of Darkseid until the end when Batman sacrifices himself and saves the day.

"Lois mourns Bruce's death. Afterwards Superman looks closer realizing that Lois is carrying Bruce's child. "


Holy crap. This would have been the true death of Superman.