I think the approach was to simply avoid origins altogether; and, well, that's what they did.
Batman's origin is never really discussed in depth; nor is Wonder Woman's.. I mean, they are re-introduced but, beyond that, I think the film spent all of 5-7 minutes of run-time on this.
Well, when I say origin story, I don't mean an entire movie devoted to how Bruce Wayne became Batman. We all know that, and it's not really needed at this point. However, a stand-alone Batman movie that establishes the new Batman character (he is, after all, quite different from Nolan's Batman) would have done wonders to help introduce us to the new DC universe, and also to Batman himself, without bogging it all down with so much other shit.
The same goes for Wonder Woman. A movie that actually builds her character would have been preferable to her just randomly showing up like she did in BvS. But it seems like DC had little interest in building their universe before throwing all the characters together, and I think it was obviously to the detriment of their film universe. They desperately wanted to catch up to Marvel, and fast, but they didn't realize that one of the main reasons that Marvel has been so successful is because they've had a plan and largely stuck to it, and have moved at their own pace. DC needs to realize that they don't need to catch Marvel. They just need to make better movies. No one is going to care if DC is ten movies behind Marvel is they're making movies just as good or better.
Doomsday kills Superman... So.... he's kind of necessary. In fact, Doomsday was invented solely to kill Superman and that's it; so, this is kind of in the spirit of the original comic.
I get that, but I thought killing off Superman so early in the universe was stupid, especially since we all know he's not really dead, at least not permanently. There was no emotion behind Superman dying specifically for that reason. That's the kind of major death you utilize several movies in, not in the second fucking one.
I think you'll see Batman tone it down quite a bit in the Justice League films.
Which would be a shame, because Batman being a badass was about the only thing that made BvS watchable, at least in the theatrical cut. I haven't seen the extended one yet so I can't comment on it.