Prior to seeing it on Thursday I was expecting a 60% drop, after seeing it I changed it to a
70% or higher. BoxOfficeMojo has the final Friday numbers at an astonishing 81% drop.
Anyone thinking that WB wasn't expecting for it to hit around $1b is delusional. You are taking two of your most prestigious properties in their entire catalog, previously movies averaging $900m each and that is without the growth in foreign markets.
Anyone thinking that the loss could be offset by post theatre release (DVD/Bluray, Digital, Cable) is again delusional. Largest physical release only generate between $40m to &75m, and the ones on the high end are typically family or kid movies like Frozen or Minions. While digital is growing, it doesn't match those numbers at this time.
No matter what way you spin it, BvS is likely to go down as one of the largest failures in movie history. While it will still land someplace between $600m and $750m, for WB to use two of their most iconic IPs and put up over $400m in production and marketing in an attempt to build the launch pad for their potential next decade of films.
The mass audience has spoken, they don't like the direction. No matter how hardcore DC fans talk about it being amazing, when you can't get general movie goers to see the film or have difficulty getting repeat business you are going to have serious problems.