I can't say that I thought "about time" when I saw this picture, but it doesn't surprise me either... As both characters are pretty much the resident Ainu representative of their respective series (Nakoruru had to share said title with her younger sister Rimururu but that's another story).
I guess that Nakoruru's appearance in KOF 14 was enough to bring some attention to her again and Kamui looks nice in Nako's outfit ^^