LOL
Well, on one hand, here's another excuse to wave an angry fist at the thought of more systematic incompetence, the wasting of countless hours of effort and manpower, investment sinking into what can only be described as a probable black hole, and the likelihood that they doomed themselves to make a similar mistake AGAIN.
Ninja edit: This doesn't rule out Luminous being used for another game, of course, but when the hands behind the engine have essentially been subsumed into FFXV, one does wonder...
On the other hand, this is good news. Unreal Engine 4 looks great, is flexible as heck, will offer plenty of support from different corners of the industry, and has quite an assortment of upcoming games utilising it, including Tekken 7, Fable Legends, Abzû, Scalebound, Rime, and Crackdown. Kingdom Hearts 3 as a result might actually come out within our lifetime, and afterwards and/or in the meantime, perhaps the company can actually release some games!