You need to brush up on the hollywood business model.
First everything is based on how much the movie cost.
What ever you seen in terms of ticket sales (excluding china) cut it in half that is how much the studio gets, assuming they didn't sell stake to other investors like Fox did with Avatar. If you look at china studios typically get 25% of the gross there, unless they have a deal with a chinese company like Tom Cruise, then they get 50%.
So you are looking at BvS, estimated cost with P&A are between 400 mil - 500mil.
800 mil is a failure
cut that in half after distribution and you get 430
You don't spend 400 mil (we'll go with the unlikely minimum) to make damn near 30 mil in profit. That stupid as shyt, plus the movie hurt the brand and was a critical failure.
compare to Deadpool.
Deadpool cost 58 ml + around 60 mil in advertise (typically for movies under 100 mil, your advertising will equal the budget of the movie) , total cost around 110 mil, pulled in 760 million worldwide. 380 mil after distribution. spend 108 mil made 278 mil profit. That is how you operate.
That is why you look at the bs DC/ WB is pulling with their universe you see off the bat they are building themselves up to fail.
Director problems with The flash, potential director problems with Aquaman, shareholders mad at Snyder and his low returns on investment, terrible PR, terrible reception, Wonder Woman budges 250 mil and having its own director problems and being tied to a shyt movie.
Then you realize Zootopia a new franchise is going to break 1 billion and has been tracking for better than BvS (two of the strong comic and movie properties in the world) and it shouldn't be a mystery why BvS is a failure
especially since they moved it to march to have as little competition as possible 
You have a point but I doubt even WB will be that dumb to drop major bread on Suicide Squad.
