This leak also corroborates the previously revealed information that another post-credits scene featuring Green Lanterns had been scrapped early on.
On a high level, the plot is relatively similar, but Joss Whedon’s final cut removed a number of worldbuilding elements, especially relating to Apokolips and Darkseid.
It’s apparent Warner Bros. screened multiple versions of the film to see what registered with audiences better, and Joss Whedon’s added humor obviously made a bigger impact in the end.
In addition to that, there’s a number of cut characters, like Iris West, Deathstroke, and Lex Luthor, with the latter two still appearing in an end credits scene.