Yup... now that's a beautiful, inspiring, hope filled moment in a Superman story.
I know this has been said thousands of times, but I think that one scene, or something similar to it, Superman reaching out to just one person and relating to them on a human level, because they are both outsiders and were feeling lost, Superman inspiring the strength within that girl and her inspiring him, BVS could have benefitted so much from that! If they needed to chop a scene, it could have served the same purpose as the Jonathan Kent scene, and I think really served to underscore this idea of Superman inspiring the best in us.
I disagree that the previous films didn't show what Batman was saying, I just think an added scene or two like that could have driven the point to the audience in an emotional and relatable way.
Superman's presence should be divisive, that was the whole point of BvS. The presence of such a being would inspire both fear and hope. And he did inspire hope, there were several scenes that showed that. And Batman saw it as well, he just got blinded by fear. But when he got to know Superman, and saw his sacrifice, it made him understand what Superman stands for.
So, I think it's absolutely justified for Batman to have that line. I also think it's a bit of an over the top reaction to say that Superman won't be an integral and important part of Justice League, as a film or as a team. Especially when we haven't seen the film yet. His absence in the promotion is important, because we are meant to feel that absence. It's deliberately building so that we will really feel it when he returns.
I think it's very respectful and reverent to the character, and clever marketing IMO. Maybe he won't have as much screen time as the others, but that's 5 characters, three of whom we haven't even been introduced to in a significant way, yet. Superman will be there, and will be very important to the story, I have no concern about that.
"Shafting" him would be to just ignore him or cast him to the side or treat him as less important. And that was not the case with this previous trailer, IMO. The spirit of Superman, the symbol of Superman, was very much a part of that trailer. They don't need to show him yet. Just be patient, don't jump to conclusions, it's just a trailer. And honestly, after everything they gave away with the BvS trailers, I'm glad they're showing as little as possible