And a confrontation with Steppenwolf in Suicide Squad would have led to a better jumping off point for Justice League.
There’s additional support that the mother boxes really could have been the thread connecting all of the DCEU (like the Infinity Stones over at Marvel).
At least, it would have helped explain why Batman was fighting parademons when that movie started.
But now that we know the Squad, throughout the course of their movie, was supposed to be tracking Steppenwolf — and that Enchantress was really under the control of the mother boxes — this changes completely what the movie could have been.