Re: Would Richard Grayson be part of this movie?
Dick has no place in this film. This is a Superman film with Batman guest starring. Nightwing has no place, Robin has no place. If the story included a younger Bruce, I could see having Dick as a child before becoming even Robin, but with an older Bruce, we should have an older Dick as well.
That said, I do want to see Dick in the solo Batman movie. Ideally, probably with elements from Robin's Reckoning to tell the origin, and ending with him leaving to become Nightwing.