Nomura is great, stop hating guys. Square works him like a slave, what do you expect, he has been credited on 41 different games so far this decade, let that sink in. And over half of those credits he had a significant role on, usually either as character designer, creative producer, or director, 10 of them he is credited as a director on.
Anyway, on topic, the fact that he has a co-director now tells me that Square once again has Nomura directing multiple games at once. Nomura said that there would be at least 1 KH spinoff game before KH4, so maybe he is already directing that, or maybe Square has him directing a standalone Verum Rex game.