The question of how the other members of the Justice League were going to be intergrated into the film was always a pertinent one (and one most people failed to correctly predict, aside from the time travelling Flash). What we got, on the surface was a clever, potted way of establishing their existence without having to see extended origins, even if it wasn't particularly well crafted. For the meta-humans to be discovered in files on Luthor's computer wasn't exactly without precedent but it wasn't particuarly elegantly executed and felt more like an excuse to shoe-horn them in. In terms of pure fan-bait, it was all pretty clever - a tease without too much follow through - but it was such an island in the wider narrative that it's hard to shake off the accusations that Batman V Superman was too concerned with being a trailer for Justice League. And it really does seem the Flash is just going to be DC's Peter Parker.