The skyline in the comic con teaser was actually Philadelphia. I've always thought Philadelphia was too close to the other communities. If they wanted to make it a giant organization that has up until recently completely avoided the radar of most of our communities they probably should make it somewhere like the west coast. But its also possible that they are just meeting in LA to tie up pre-production loose ends, and they are actually not filming near there. I think we will start finding things out in the upcoming weeks.