I've been getting countless requests for pm's on what happened in the movie from a screening back in June and I figured I'd just post it here.
In this cut Joker has at least 30 minutes of screen time. His flashback scenes with Harley are not as short as the version were getting but also not incredibly long in length either (a minute or two at the most).
The longest of the flashback scenes is the scene with Harleen chasing after Joker, them arguing, her pointing a gun at her head and him then smacking her to the ground. This scene is about 6 minutes in length and leads into the Ace Chemicals (aka the chemical wedding). This scene in short is basically Harleen being angry with Joker for leaving her, in which he explains she can't handle someone like him, she says she can and wants to, he hits her, explains she knows nothing about him and he doesn't even understand how he'd be in a "relationship", she tells him she wants to know everything about him, where he was created, he smiles as she gets up and thus this leads to ace. (This paticular scene was not well received at this screening. Audience members mentioned their uncomfortableness and overall displeasure with such a violent act then met with a very sweet one on top of the film ending with this couple getting back together).
Because in this version joker pushes Harley out of his helicopter when they reunite in the helicopter, certain scenes are different Then the cut were getting.
In this showing Joker shows up once before the helicopter scene, and this once is with Ike Barinholtz's character with the "toys" line. He gets info from him on where Harley is, and when Ike's character makes a inappropriate comment about Harley joker is enraged and kills him.
Cut to him picking Harley up. She climbs in, they reunite. He doesn't know about the bombs, so naturally Harley can't say anything. He gets mad. She gets mad. She beats him up. He kisses her. Then pushes her out.
Later he shows up after his copter was shot down and fights the squad (seemingly for Harley)(this is where the bye bye scene is).
Those are most of the jokers scenes from the screening in June. Now remember this screening was received poorly, so take that however you want.
I personally am sad about the bye bye scene being cut the most. But I can understand the removal of the others since the GA wouldn't understand quite why Harley stays with joker if the only things they ever showed were negative (on top of him literally trying to murder her). But I am also disappointed they couldn't find a way to show the violent side better.