It looks like Matt Riddle will be going up against Kassius Ohno for his first official NXT feud.
During last night's episode, Ohno told GM William Regal that he was sick of being pushed to the back of the line ever time NXT gets a new “toy,” and made a clear reference to "The King of Bros" making his imminent arrival on the yellow and black brand.
Though obviously not set in stone, this is usually how WWE goes about laying the groundwork for a new angle or feud, so it's a pretty safe bet.
That said, Velveteen Dream also appears to have called out Riddle over Twitter: