It's probably too soon to be asking, but does this mean Snyder is off JL or that he's just taking a leave for awhile? The article isn't really clear on him coming back which makes me think final cut duties will rest on Whedon.
I've taken it as Whedon is finishing Justice League. In the article it says that WB was willing to delay Justice League so Zack could take time off but he was against that idea. Props to WB for even considering a delay for Zack.
And WB is still on board for Zack to direct two passion projects when he returns and is ready to work.