Justice League Part One plot rumor:

“Batman is trying to assemble the Justice League to protect the Earth from Darkseid, while the government, represented by Amanda Waller and Wade Eiling, is trying to capture them. 

Darkseid is a “force of nature”, and is impending arrival is described as “apocalyptic” with biblical undertones. He’s also being redesigned, though they’ll try to keep his classic look in mind. 

Superman’s rebirth is somehow connected to Darkseid, and includes Darkseid attempting to corrupt him in some sort of astral plane. Lois will be important to this subplot. 

Darkseid will have some sort of ability to force the League members to handle their own dark sides and go through psychological trials. It appears to be capacity for good remains a theme of the movie, with the League members all being shown to be dysfunctional, angry people that could have tipped over to the dark side easily if circumstances were a little different.

The focus is on the six mains and Lois. Everyone else is just minor.”  *