Snyder said we are getting more Knightmare sequences. That's why in the trailer you see what's left of a demolished Hall of Justice with Aquaman's trident in the rubble. I believe Snyder mentioned that we will also see 8-arm Knightmare Cyborg in the Snyder Cut. Bats, Flash, Cyborg, Deathstroke and Joker (Leto) were all supposed to team together in JL-Pt2 to help Flash go back in time to the right moment to warn past Bruce as the moment Flash goes back in BvS is apparently not far enough. Flash needs to go back a little further to prevent the Knightmare from happening. If I remember correctly, most of JL Pt2 was supposed to be in the Knightmare sequence. However, I think the only way we'll see anything like that is if there's a high enough streaming count when the Snyder Cut releases so they know we want to see not just his full vision for JL P1 but for his entire JL 3part story.