[GreenLantern]

I'd love to see a fist fight between Luthor and Superman after Supes had his powers drained by exactly what photon said, a red sun ray gun.. which has happened before in the comics multiple times.

Casting Luthor is going to be very tricky, this is a pivotal cast moving forward... it will make or break the franchise and could erase all of the success the first movie has had at the box office.

I wouldn't be surprised if we don't see him as a big villain until the third movie.. with just a minor role/introduction in the second movie.

I would love to see Darkseid in one of the movies.. but something tells me that is more of a JLA villain.