Hate to be the one to break this to y'all, but it's clearly fake. I was laughed at and mocked last year when I said I hated the idea of another Spider-man origin story because "Marvel don't do origin stories anymore, idiot!!!", so...
Plus, they clearly just stole a bunch of scenes from Nolan movies for the special effects.
(For the person who will misread the above and try to correct me: It's sarcasm.)
The trailer looks fairly good, but I generally don't like Marvel humour so I'll keep my expectations to a minimum. Always get burned when I go into a Marvel Movie really excited about it.