Based on Snyder's comments in some of the recent interviews, it definitely suggests that we won't be seeing Superman on screen for quite awhile, let alone interacting much with the league.
If BvS was a strong indication, Superman probably won't have any real interaction with the other heroes. He only exchanged like one line with Wonder Woman, who had mainly interacted with Batman.
Despite technically being in a shared universe, it doesn't ever really feel like Superman is a part of it outside of his scenes with Batman since Snyder keeps putting him in the corner.
And the possibility of him coming back evil hasn't been completely wiped out as of yet. I don't expect to see a real justice league film until it's sequel arrives, where we will hopefully have a new director and where superman isn't dead at the start of the film.