Where did we get the idea that only Noctis is playable? previous trailers have shown player take direct control over other characters. For instance when you are using the blonde with a gun, it goes into 3rd person shooter style.
Square Enix has FF Type-0 HD coming in March, and we know Tomb Raider for Holiday. They MIGHT still put FFXV in Holiday 2015 to ensure success but that isn't a definite. I think 2016 is most practical though.
Greatness Awaits
PSN:Forevercloud (looking for Soul Sacrifice Partners!!!)