I hope it's there, but I think instead of being "100% sure" about it, simply be optimistic and prepare for the worse case scenario. That way, you won't feel as disappointed if you're wrong.
It's just best to try and ignore everything until the time comes, unless you get direct quotes from SE saying clear-cut things like "FFXV will be at TGS 2014." Until then, be cautious and wait.
That's my advice, anyway. Feel free to be 100% sure it'll appear and bet your avatar away if you like, lol.