Yes, FFXV was released the year FF7R was announced. Though at that time the game was contracted to Cyber2Connect which we know didn't meet their expectations and finally got scrap.
And with FFXV being the highest seller so far and the remake being also quite expensive to make I don't think they will forfeit releasing FFXVI.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"