I believe the reason for these two items is they're drawing from the New 52 version of things. Which is unfortunate cause the New 52 was garbage, but that doesn't mean the movie will suck.
Speaking specifically about the Batman half of that, at least in the comics there's a story-continuity to Batman's evolving personality. The big problem with Batman v Superman, in my opinion, is that there isn't enough history
in the movies with these iterations of the characters to make their conflict have any meaning. In TDKR, that fight is a culmination of decades of the characters' history and build up to that point. It was playing off of our expectations and projections of those characters extrapolated into the future. In BvS they've barely met and then they are fighting, for no reason, in the culmination of nothing.
Now, after decades of being a loner fighting a depressing vigilante crusade, and apparently after the death of Robin makes him even more insular, even more hardened, even more distrustful, he's going to turn around and do a one eighty on that set up to become a community organizer? I'm not saying Batman can't be the guy to form the Justice League. I'm saying the Batman in BvS appears to be an extrapolation of the Batman from the 80s and 90s that has no reason whatsoever to be a team player. When Affleck starts saying he's putting together a team, I hear Batman trying to imitate Nick Fury forming the Avengers.
I personally think Affleck's portrayal of Batman in BvS was the best part of BvS. I hope they don't ruin one of the only good things they did in the movie by trying to turn him into Nick Fury. I want to keep an open mind, but to me Bruce Wayne doesn't try to get people to join a team to face an unknown threat he knows nothing about. Bruce Wayne already knows everything about you when he comes to recruit you, and he knows what you care about, and he knows what buttons to push to get you to agree, and he knows what's coming because he spends every waking moment in an almost paranoid sweat learning everything he can about everything he needs to know, because Batman needs to (try to) control everything.
What connects the most liked iterations of Batman, from the Timmverse animated Batman to the Burton Batman to the Nolan Batman to even the Affleck Batman is that while they all have different capabilities and somewhat different personalities, they all approached the world as if the enemy wasn't evil, it was chaos. It was the unexpected unpredictable injustice of a boy having his parents killed in an alley randomly for no reason. And his job was to bring justice to the world by bringing order to it. And the common denominator is that Batman always has a plan. Tim Burton's Batman brings down the Joker by studying him, by researching his methods, by being a detective, and then by formulating a plan to defeat him. Nolan's Batman formulates a plan to create the bogeyman of the Batman persona itself to defeat organized crime in Gotham. And flawed though it is, the Snyder Batman formulates a rather involved plan to defeat Superman who he believes is a threat to humanity, because he can't live with the idea of the *risk* of an out of control Superman killing billions. It is the uncertainty of the situation that creates the certainty in his mind.
Batman shouldn't be playing defense. The trailer seems to imply he is. Maybe the movie has a different tone we'll see when more stuff comes out. But I think even if the comics have gone this way, that doesn't mean the groundwork has been laid for this Batman to follow that same path, and I don't think there's any way to get him there quickly enough without being jarring.
