Not my content so don't shoot the messenger. This was posted by /u/DC_CINEMATIC. It is the first post that account has made so obviously take it with a grain of salt. Here's the post:
These are all rumors.
TIER 1 - Confirmed by multiple sources
TIER 2 - Confirmed by some, denied by others
TIER 3 - Speculation from within that has yet to be confirmed.
TIER 1:
- The African woman who speaks at the beginning of the film is an actress paid for by Lex Luthor.
- Mercy was uncomfortable with what Luthor was doing. Knowing this, Lex leads Mercy to her death out of spite for being unfaithful to him.
The Justice League cameos are not via an email in the Ultimate Cut.
- Aquaman, Flash and Cyborg are seen in "action" during the end credits. Due to time constraints, they had to cut this sequence and their stories within the film. The email scene was a last minute idea to be able tease the Justice League characters in a short amount of time.
- Luthor comes across as a more grounded character. His story makes much more sense with all his important character moments included and in the correct order.
- Snyder signed on to make a "3 and a half hour epic" and stressed the importance of this as to separate themselves from what Marvel is doing. He stressed that he needed at least 3 hours. WB gave him the go ahead. This cut of the film received overwhelmingly positive reception from within the studio, which made them over-confident. Having been impressed by the quality of the film, they then focused their attention towards the profitability of the film. 2 MONTHS before the release date, Warner Bros panicked and pulled the plug on the idea of a 3 hour film.
- Man of Steel sequel is happening. Date will be announced at SDCC 2016
TIER 2:
- We get a glimpse of Themyscira.
- Lois and Diana have met before.
- 'Justice League' will be at least 2 and a half hours long, but with a much simpler/lighter story. Snyder had planned for it to be longer, but it was always going to be lighter in tone.
- Ben Affleck is supportive of Zack Snyder. As is Warner Bros.
TIER 3 -
- Zack Snyder doesn't want to direct Justice League part 2. Instead, he is planning on adapting a novel for his next project.