So I was watching a bit of the Superman/Batman Apocalypse animated film earlier today on one of the HBO channels and it got me thinking about BvS and all of these Doomsday rumors. I gotta say I'm not opposed to them taking a bit of inspiration from a couple of scenes in the animated film for BvS. In particular, when the army of Doomsday clones attack through one of Darkseid's boom tubes. It would be an interesting way of introducing Doomsday without being the real Doomsday (which could saved for a Death of Superman movie). While also setting up Darkseid for the Justice League.
Personally I'd like to see Supergirl introduced and the reason Darkseid comes to Earth, abducts her and then sets up Justice League Part 1 for her rescue mission and then Part 2 defending Darkseid's attack on Earth. It keeps Superman as the center of the group but gives opportunity for the other members to keep him in check. And introducing a Green Lantern or Martian Manhunter would flow better as well. It also has them team up away from Earth which give them something different from the Avengers. But I know that's not going to happen so why am I even talking about this lol