For those still arguing about whether or not this was a financial success I think miss the point overall. This wasn't a single movie, if it was then yes it was a success. It was meant to be the true start (not MOS) of a franchise. It needed to break a Billion to prove the DCU has ongoing presence and staying power. There's no other movie DC can make, except perhaps JL, that will be as such a financial power house as BvS should've been. The fact that Superman, Batman, and Wonder Woman are all on screen together and meeting for the 1st time is HUGE! If fans are disappointed in that, good luck trying to win them over in future installments that won't nearly have as much impact. So, yes $870 million is a lot of money (with a budget of around $400 total with marketing expenses) but it barely doubled its cost. If this movie didn't have the significance of what it was, most studios would've cancelled future plans just like Sony did with Amazing Spider-Man's proposed spin off universe. WB/DC needed a billion to be able to finance the other upcoming movies without worrying about their individual financial successes.
DC's approach was the opposite of Marvel's. Draw the fans in with the headliner, then give them a bunch of smaller films. As opposed to making the smaller films first that lead into the headliner. If people didn't go out in droves to see this, it doesn't have much hope for success from individual less important characters. Suicide Squad, Aquaman, Cyborg, Shazaam, Flash, Wonder Woman and Green Lantern Corps (Batman will always make money). Those movies will need to be damn good to make the money they now need to. Hopefully JL will win people back over but with Snyder still at the helm, it's most likely going to be as dark, grim and depressing as MOS & BvS... And since it seems that is not what the overwhelming majority of fans want, that's bad news for DC/WB..
Just my take on the $$$ subject, since this is still being debated... So flame away...