So I'm supposed to believe that SE printed out special invites for this event with "announcement" spelled wrong twice and them showing a trailer made of rehashed scenes from past Versus trailers with nothing new on it to announce a name change? Not only that but this is an E3 trailer so why is the CERO sign there? It's the Japanese rating system and it has no place in an English trailer. I'd also expect full English voice acting at this point and some gameplay for a game that's supposed to come out soon.
Sorry but this screams fake to me. Agito XIII being renamed into Type 0 is one thing but taking a spin-off and renaming it FFXV is a whole different matter. Besides there's a FF team that hasn't released a game in a while so chances are they are the ones working on the new main title.